Anderson, J. (1896) - A contribution to the herpetology of Arabia, with a preliminary list of the reptiles and batrachians of Egypt. - R.H. Porter, London. 222 S.
Anderson, J. (1898) - Zoology of Egypt. Vol. 1. Reptilia and Batrachia. - London: B. Quaritch, LVIII + 371 pp.
Anderson, J. (1901) - A list of the Reptiles and Batrachians obtained by Mr. A. Blayney Percival in Southern Arabia. - Proceedings of the Zoological Society of London, 1901 (2): 137-152.
Arillo, A. & Balletto, E. & Spanò, S. (1967) - Il genere Latastia Bedriaga in Somalia. - Bollettino dei Musei e degli Istituti Biologici Dell’Università di Genova, 35 (229): 105-145.
Arillo, A. & Balletto, E. & Spanò, S. (1967) - Description of Latastia longicaudata lanzai. - In: Il genere Latastia Bedriaga in Somalia. – Boll. Mus. Ist. Biol. Univ., Genova, 35: 105-145.
Arnold, E.N. (1986) - The hemipenis of lacertid lizards (Reptilia:Lacertidae): structure, variation and systematic implications. - Journal of Natural History, London, 20: 1221-1257.
Arnold, E.N. (1987) - Zoogeography of the Reptiles and Amphibians of Arabia. - In: Krupp, F., W. Schneider & R. Kinzelbach (Eds.): Proceedings of the Symposium on the Fauna and Zoogeography of the Middle East - BEIHEFTE ZUM TÜBINGER ATLAS DES VORDEREN ORIENTS, Reihe A (Naturwissenschaften) Nr. 28: 245-256.
Arnold, E.N. (2002) - History and function of scale microornamentation in lacertid lizards. - Journal of Morphology, 252 (2): 145-169.
Baha El Din, S.M. (2006) - A guide to the reptiles and amphibians of Egypt. - The American University in Cairo Press, Cairo. xvi + 359 pp.
Barbour, T. (1913) - Reptiles and Amphibians from Eastern Sudan - Proceedings of the Biological Society of Washington, 26: 145-150.
Battersby, J.C. (1954) - Reptiles and amphibians collected in the northern frontier division of Kenya in 1951. - The Annals and magazine of natural history, ser. 12 VII: 241-248.
Bauer, A.M. & Günther, R. (1995) - An annotated type catalogue of the lacertids (Reptilia: Lacertidae) in the Zoological Museum, Berlin. - Mitteilungen aus dem Zoologischen Museum in Berlin, 71: 37-62.
Bedriaga, J. von (1884) - Die neue Lacertiden-Gattung Latastia und ihre Arten (L. doriai n.sp. var. Martensi m., Samharica Blanf. und Boscai n.sp.). - Annali del Museo civico di storia naturale di Genova, 20: 307-324.
Bischoff, W. (1998) - Übersicht der Arten und Unterarten der Familie Lacertidae. 5. Nachtrag. - Die Eidechse, Bonn, 9 (3): 91-99.
Blanford, W.T. (1870) - Description of Lacerta samharica (= Latastia longicaudata REUSS 1834). - In: “Observations on the Geology and Zoology of Abyssinia”. MacMillan & Co, London 1870. i-xii, 1-488.
Boettger, O. (1893) - Katalog der Reptilien-Sammlung im Museum der Senckenbergischen Naturforschenden Gesellschaft in Frankfurt am Main, I. Teil (Phynchocephalen, Schildkröten, Krokodile, Eidechsen, Chamäleons). - Gebrüder Knauer, Frankfurt. 140 pp.
Böhme, W. & Heath, J. (2018) - Amphibian and reptilian records from south-central Mali and western Burkina Faso. - Bonn zoological Bulletin, 67 (1): 59-69.
Boulenger, G.A. (1887) - Catalogue of the lizards in the British Museum (Natural History). Vol. III. Lacertidae. - London, 1887: I-XII + 1-118.
Boulenger, G.A. (1892) - On some Reptiles collected by Sig. L. Bricchetti Robecchi in Somaliland. - Annali del Museo Civico de Storia Naturale di Genova, (2) 12: 5-15.
Boulenger, G.A. (1895) - An account of the reptiles and batrachians collected by Dr. A. Donaldson Smith in western Somaliland and the Galla Country. - Proceedings of the Zoological Society of London: 530-540.
Boulenger, G.A. (1895) - On the reptiles and batrachians obtained by Mr. E. Lort-Phillips in Somaliland. - The Annals and magazine of natural history, (6) 16:165-169.
Boulenger, G.A. (1896) - A list of the Reptiles and Batrachians collected by Dr. Ragazzi in Shoa and Eritrea. - Annali del Museo Civico de Storia Naturale di Genova, (2) 16: 545-554.
Boulenger, G.A. (1896) - A list of the reptiles and batrachians collected by the late Prince Eugenio Ruspoli in Somaliland and Gallaland in 1893. - Annali del Museo civico di storia naturale di Genova, (2) 17: 5-23.
Boulenger, G.A. (1896) - Report on Capt. Bottego`s second collection of reptiles and batrachians from Somaliland. - Annali del Museo civico di storia naturale di Genova, Serie 2, 17: 15-23.
Boulenger, G.A. (1907) - Remarks on Prof. L. von Méhely´s paper “Zur Lösung der ´Muralis-Frage`”. - The Annals and magazine of natural history, (7) 20: 39-46.
Boulenger, G.A. (1921) - Monograph of the Lacertidae. Vol. II. - British Museum (Natural History). Department of Zoology. London. 451 pp.
Bowker, R.G. & Wright, C.L. & Bowker, G.E. (1998) - The relationship between thermoregulation and lifestyle in three species of lacertid lizards. - In: Janev, B., Grbac, I., Lupret-Obradović & B. Lazar (eds.): Abstracts of the 3rd International Symposium on the Lacertids of the Mediterranean Basin, 25-29 May 1998, Cres, Croatia: 34.
Brito, J.C. & Rebelo, H. & Crochet, P.-A. & Geniez, P. (2008) - Data on the distribution of amphibians and reptiles from North and West Africa, with emphasis on Acanthodactylus lizards and the Sahara Desert. - Herpetological Bulletin, 105: 19-27.
Brown, R.P. (2005) - Large Subunit Mitochondrial rRNA Secondary Structures and Site-Specific Rate Variation in Two Lizard Lineages - Journal of Molecular Evolution, 60 (1): 45-56
Bursey, C.R. & Goldberg, S.R. (2011) - A new species of Spauligodon (Nematoda: Oxyuroidea: Pharyngodonidae) in Latastia longicaudata (Sauria: Lacertidae) from Kenya. - Journal of Parasitology, Lawrence, 97 (3): 460-462.
Castilla, A.M. & Van Damme, R. & Bauwens, D. (1999) - Field body temperatures, mechanisms of thermoregulation and evolution of thermal characteristics in lacertid lizards. - Natura Croatica, Zagreb, 8 (3): 253-274.
Chirio, L. (2009) - Inventaire des reptiles de la région de la Réserve de Biosphère Transfrontalière du W (Niger/Bénin/Burkina Faso : Afrique de l’Ouest). - Bulletin de la Société Herpétologique de France, 132: 13-41.
Chirio, L. & Ineich, I. (2006) - Biogeography of the reptiles of the Central African Republic. - African Journal of Herpetology, Johannesburg, South Africa, 55 (1): 23-59.
Chirio, L. & LeBreton, M. (2007) - Atlas des reptiles du Cameroun. - Muséum national d’Histoire naturelle, IRD, Paris. 688 pp.
Cissé, M. & Karns, D.R. (1979) - Les sauriens du Sénégal. - Bulletin de l`Institut Fondamental d`Afrique Noire 40 (1): 144-211.
Cox, N.A. & Mallon, D. & Bowles, P. & Els, J. & Togndelli, M.F. (2012) - The Conservation Status and Distribution of Reptiles of the Arabian Peninsula. - Cambridge, UK and Gland, Switzerland: IUCN, and Sharjah, UAE: Environment and Protected Areas Authority. 38 pp.
Dunger, G.T. (1967) - The Lizards and Snakes of Nigeria. Part II: The Lacertids of Nigeria. - Nigerian Field, 32 (3): 117-131.
Engleder, A. & Haring, E. & Kirchhof, S. & Mayer, W. (2013) - Multiple nuclear and mitochondrial DNA sequences provide new insights into the phylogeny of South African Lacertids (Lacertidae, Eremiadinae). - Journal of Zoological Systematics and Evolutionary Research, Berlin, 51 (2): 132-143.
Fitch, H.S. (1970) - Lacertidae. - Reproductive Cycles of Lizards and Snakes. Miscellaneous Publications of University of Kansas, 52: 102-107.
Flower, S.S. (1933) - Notes on the recent reptiles and amphibians of Egypt, with a list of the species recorded from that Kingdom. - Proceedings of the Zoological Society of London, 1933: 735-851.
Fratello, B. & Maramaldo, R. & Marte, A. (1997) - I sauri della Collezione Franchini. - Atti Soc. Nat. Mat. Modena 128: 127-148.
Goldberg, S.R. (2010) - Latastia longicaudata Reuss, 1834 Southern Long-tailed Lizard. Reproduction. - African Herp News, Bloemfontein, South Africa, 52: 18-19.
Gonçalves, D.V. & Álvares, F. & Brito, J.C. (2013) - Data on the distribution of herpetofauna of southern Niger with comments on Termit & Tin Toumma National Nature Reserve. - Boletin de la Asociación Herpetológica Española, 24 (1): 74-79.
Harris, D.J. (1999) - Molecular systematics and evolution of lacertid lizards. - Natura Croatica, Zagreb, 8 (3): 161-180.
Harris, D.J. & Arnold, E.N. & Thomas, R.H. (1998) - Relationships of lacertid lizards (Reptilia: Lacertidae) estimated from mitochondrial DNA sequences and morphology. - Proceedings of the Royal Society, 265: 1939-1948.
Heisch, R.B. (1958) - On Leishmania Adleri Sp. Nov. from Lacertid Lizards (Latastia Sp.) in Kenya. - Annals of Tropical Medicine & Parasitology, London, 52 (1): 68-71.
Hipsley, C. (2012) - Evolutionary consequences of Cenozoic climate change on African lacertid lizards (Squamata: Lacertidae). - Ph.D. dissertation, University of California. 126 pp.
Hipsley, C. & Himmelmann L. & Metzler D. & Müller J. (2009) - Integration of Bayesian molecular clock methods and fossil-based soft bounds reveals early Cenozoic origin of African lacertid lizards. - BMC Evolutionary Biology, 9: 151.
Holtmann, T. (2013) - Rote Renner mit Halsketten. - News, die Zeitschrift für Aquaristik und Terraristik, 107: 34-38.
Howell, K. & Msuya, C.A. & Ngalason, W. & Niagate, B. & Wagner, P. & Wilms, T. & Jumaily, M.M. & Sindaco, R. & Baha el Din, S. (2021) - Latastia longicaudata. - The IUCN Red List of Threatened Species, 2021, e.T197494A2490375. Available from: https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T197494A2490375.en
Ineich, I. (2001) - Reptiles & Amphibiens de la République de Djibouti. - Rapport sur la mission herpétologique de Ivan INEICH, Avril 1999.
Ineich, I. & Chirio, L. & Ascani, M. & Rabeil, T. & Newby, J. (2014) - Herpetofauna of Termit Massif and neighbour areas in Tenere Desert, southeastern Niger, West Africa. - Herpetology Notes, 7: 375-390.
Ineich, I. & Doronin, I.V. & Cheylan, M. & Campbell, P.D. (2019) - Additional data on the herpetological collection of Louis Amédée Lantz (1886–1953), with emphasis on specimens in the Natural History Museum, London. - Zootaxa, 4638 (1): 95-113.
Joger, U. (1982) - Zur Herpetofaunistik Westafrikas. - Bonner Zoologische Beiträge, Bonn, 32 (2-4): 297-340.
Kirchhof, S. & Losogo, L.B. & Gooh, C.S. & Malonza, P.K. (2018) - Latastia longicaudata Common long-tailed Lizard (Reuss, 1834). Diet. - African Herp News, Bloemfontein, South Africa, 67: 21-25.
Kroniger, M. & Zawadzki, M. (2005) - Eidechsen im Terrarium. - Draco, Münster, 6 (1): 28-37.
Lanza, B. (1990) - Amphibians and reptiles of the Somali Democratic Republic: Checklist and biogeography. - Biogeographia, 14: 407-429.
Largen, M.J. (1997) - An annotated checklist of the amphibians and reptiles of Eritrea, with keys for their identification. - Tropical Zoology, 10 (1): 63-115.
Largen, M.J. & Spawls, S. (2006) - Lizards of Ethiopia (Reptilia Sauria):an annotated checklist, bibliography,gazetteer and identification key. - Tropical Zoology, 19 (1): 21-109.
LeBreton, M. (1999) - A working checklist of the herpetofauna of Cameroon - With localities for species occurring in southern Cameroon and a list of herpetofauna for the Dja Faunal Reserve. - Netherlands Committee for IUCN
Leviton, A.E. & Anderson, S.C. (2010) - The herpetological literature for south western Asia. An indexed bibliography. - Occasional Papers of the California Academy of Sciences, 157: 1-634.
Lewin, A. & Feldman, A. & Bauer, A.M. & Belmaker, J. & Broadley, D.G. & Chirio, L. & Itescu, Y. & LeBreton, M. & Maza, E. & Meirte, D. & Nagy, Z.T. & Novosolov, M. & Roll, U. & Tallowin, O. & Trape, J.-F. & Vidan, E. & Meiri, S. (2016) - Patterns of species richness, endemism and environmental gradients of African reptiles. - Journal of Biogeography, 43 (12): 2380-2390.
Lönnberg, E. (1907) - Reptilia and Batrachia. - In: Sjöstedt, B.Y. (ed) Wissenschaftliche ergebnisse der Schwedischen zoologischen expedition nach dem Kilimanjaro, dem Meru und den umgebenden Massai-steppen Deutsch-Ostafrikas, 1905-1906, 4: 1-28.
Loveridge, A. (1929) - East African Reptiles and Amphibians in the United States National Museum. - United States National Museum Bulletin, 151: 61-65
Loveridge, A. (1933) - Reports on the Scientific Results of an Expedition to the Southwestern Highlands of Tanganyika Territory. VII: Herpetology. - Bulletin of the Museum of Comparative Zoology at Harvard College, 74: 197-416.
Loveridge, A. (1936) - African reptiles and amphibians in Field Museum of Natural History. - Lacertidae. - Publication (Field Museum of Natural History), 22 (1): 59-63.
Loveridge, A. (1936) - Reports on the Scientific results of an expedition to the Rain Forest regions in eastern Africa. - Bulletin of the Museum of Comparative Zoology, Harvard, 79: 207-337.
Loveridge, A. (1937) - Reports on the Scientific Results of an Expedition to Rain Forrest Regions in Eastern Africa. IX: Zoögeography and Itinerary. - Bulletin of the Museum of Comparative Zoology at Harvard College, 79 (9): 481-541.
Loveridge, A. (1957) - Checklist of the reptiles and amphibians of East Africa (Uganda; Kenya; Tanganyika; Zanzibar). - Bulletin of the Museum of Comparative Zoology at Harvard College. 117(2): 151-362, i-xxxvi.
Malonza, P.K. & Bwong, B.A. & Muchai, V. (2011) - Kitobo Forest of Kenya, a unique hotspot of herpetofaunal diversity - Acta Herpetologica, 6 (2): 149-160.
Malonza, P.K. & Wasonga, V.D. & Muchai, V. & Rotich, D. & Bwong, B.A. (2006) - Diversity and biogeography of herpetofauna of the Tana river Primate National Reserve, Kenya. - Journal of East African Natural History, Oxford, 95 (2): 95–109.
Marx, H. (1968) - Checklist of The Reptiles and Amphibians of Egypt. - Special Publication United States Naval Research Unit Number Three Cairo, Egypt. 91 pp.
Mayer, W. & Benyr, G. (1994) - Albumin-Evolution und Phylogenese in der Familie Lacertidae. - Annalen des Naturhistorischen Museums in Wien, 96 B: 621-648.
Mayer, W. & Pavlicev, M. (2007) - The phylogeny of the family Lacertidae (Reptilia) based on nuclear DNA sequences: Convergent adaptations to arid habitats within the subfamily Eremiainae. - Molecular Phylogenetics and Evolution, 44: 1155–1163.
Mazuch, T. (2003) - Reptiles and amphibians of Kenya recently collected by expedition “Invissible” Biodiversity III, Kenya 2003. - http://www.megasphera.cz/africanvenomoussnakes/_private/Biodiverzita%202003%20Report.htm
Méhely, L. (1909) - Materialien zu einer Systematik und Phylogenie der Muralis-ähnlichen Lacerten. - Annales historico-naturales Musei nationalis hungarici, Budapest, 7: 409-621
Meiri, S. (2008) - Evolution and ecology of lizard body sizes. - Global Ecology and Biogeography, 17 (6): 724-734.
Meiri, S. & Bauer, A.M. & Chirio, L. & Colli, G.R. & Das, I. & Doan, T.M. & Feldman, A. & Herrera, F.-C. & Novosolov, M. & Pafilis, P. Pincheira-Donoso, D. & Powney, G. & Torres-Carvajal, O. & Uetz, P. & Van Damme, R. (2013) - Are lizards feeling the heat? A tale of ecology and evolution under two temperatures. - Global Ecology and Biogeography, 22: 834-845.
Mertens, R. (1922) - Verzeichnis der Typen in der herpetologischen Sammlung des Senckenbergischen Museums. - Senckenbergiana, Frankfurt/Main, 4: 162-183.
Neumann, O. (1905) - Über nordost-afrikanische und arabische Kriechtiere. - Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere, Jena, 22: 389-404.
Nickel, H. (2002) - Durch die Wüste – Die Westafrika-Expedition des Museums Alexander Koenig. - Reptilia, Münster, 7 (4): 24-31.
Nieden, F. (1913) - Neues Verzeichnis der Kriechtiere (außer den Schlangen) von Deutsch-Ostafrika. - Mitteilungen aus dem Zoologischen Museum in Berlin, 7: 51-100.
Padial, J.M. (2006) - Commented distributional list of the reptiles of Mauritania (West Africa). - Graellsia, 62 (2): 159-178.
Papenfuss, T.J. (1969) - Preliminary Analysis of the Reptiles of Arid Central West Africa. - The Wasmann Journal of Biology, 27 (2): 249-325.
Parker, H.W. (1932) - Scientific results of the Cambridge expedition to the east African lakes, 1930-31. 5. Reptiles and amphibians. - The Journal of the Linnean Society of London. Zoology, 38: 213-229.
Parker, H.W. (1942) - The lizards of British Somaliland. - Bulletin of the Museum of Comparative Zoology at Harvard College, 91 (1): 1-101.
Pérez i de Lanuza, G. & Font, E. (2016) - The evolution of colour pattern complexity: selection for conspicuousness favours contrasting within-body colour combinations in lizards - Journal of Evolutionary Biology, 29 (5): 942-951.
Reuss, A. (1834) - Description of Latastia longicaudata. - In: “Zoologische Miscellen, Reptilien. Saurier. Batrachier”. Museum Senckenbergianum, Frankfurt am Main, 1 (6): 27-62.
Rovatsos, M. & Kratochvíl, L. & Altmanová, M. & Johnson Pokorná, M. (2015) - Interstitial Telomeric Motifs in Squamate Reptiles: When the Exceptions Outnumber the Rule. - PLoS ONE 10 (8): e0134985.
Rovatsos, M. & Vukic, J. & Altmanová, M. & Johnson Pokorná, M. & Moravec, J. & Kratochvíl, L. (2016) - Conservation of sex chromosomes in lacertid lizards. - Molecular Ecology, 25 (13): 3120-3126.
Schätti, B. (2001) - On the type locality and North-east African distribution of Latastia l. longicaudata (REUSS, 1834). - Herpetozoa, Wien, 14 (1/2): 5-7.
Schlüter, U. (2004) - Bemerkungen zur Gewöhnlichen Langschwanzeidechse, Latastia longicaudata (REUSS, 1834). - Die Eidechse, Bonn, 15 (2): 52-57.
Schmidt, K.P. (1953) - Amphibians and Reptiles of Yemen. - Fieldiana: Zoology, 34 (20): 253-261.
Scortecci, G. (1929) - Rettili dell`Eritrea esistenti nelle Collezioni del Museo Civico de Milano. - Atti della Società Italiana di Scienze Naturali, e del Museo Civico di Storia Naturale, Milano, 67 (3-4): 290-339.
Smid, J. & Sindaco, R. & Shobrak, N. & Busais, S. & Tarnar, K. & Aghová, T. & Simó-Riudalbas, M. & Tarroso, P. & Geniez, P. & Crochet, P.A. & Els, J. & Burriel-Carranza, B. & Tejero-Cicuéndez, H. & Carranza, S. (2021) - Diversity patterns and evolutionary history of Arabian squamates. - Journal of Biogeography. 2021; 00: 1–17 (early view)
Sow, A.S. & Gonçalves, D.V. & Sousa, F.V. & Martínez-Freiría, F. & Santarém, F. & Velo-Antón, G. & Dieng, H. & Campos, J.C. & Diagne, S.K. & Brito, J.C. (2017) - Atlas of the distribution of amphibians and reptiles in the Diawling National Park, Mauritania. - Basic and Applied Herpetology, 31: 101-116.
Spawls, S. & Rotich, D. (1997) - An Annotated Checklist of the Lizards of Kenya. - Journal of East African Natural History, Oxford, 86 (1-2): 61-83.
Steindachner, F. (1901) - Expedition S.M. Schiff `Pola` in das Rothe Meer, XVII Bericht über die Herpetologischen Aufsammlungen. - Denkschriften der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse, 69: 324-335.
Tornier, G. (1900) - Neue Liste der Crocodilen, Schildkröten und Eidechsen Deutsch-Ost-Afrikas. - Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere, Jena, 13: 579-681.
Tornier, G. (1905) - Schildkröten und Eidechsen aus Nord-Ost Afrika und Arabien. Aus Carlo v. Erlanger`s und Oscar Neumann`s Forschungsreise. - Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere, Jena, 22: 365-388.
Trapé, J.-F. & Trapé, S. & Chirio, L. (2012) - Lézards, crocodiles et tortues d`Afrique occidentale et du Sahara. - IRD Éditions, Marseille. 503 pp.
Vaillant, L. (1882) - Mission G. Révoil aux pays Çomalis. Reptiles et Batraciens. - In: Révoil, G. - Faune et flore des pays Çomalis (Afrique orientale). Paris. 1-25.
Vanhooydonck, B. & Van Damme, R. (2001) - Evolutionary trade-offs in locomotor capacities in lacertid lizards: are splendid sprinters clumsy climbers? - Journal of Evolutionary Biology, 14 (1): 46–54.
Vanhooydonck, B. & Van Damme, R. (2003) - Relationships between locomotor performance, microhabitat use and antipredator behaviour in lacertid lizards - Functional Ecology, 17 (2): 160-169.
Vanhooydonck, B. & Van Damme, R. & Aerts, P. (2001) - Speed and stamina trade-off in lacertid lizards. - Evolution, 55 (5): 1040–1048.
Vigo, G. & Geniez, Ü. & Trape, J.-F. (2016) - Premières observations de Latastia longicaudata (Reuss, 1834) (Squamata, Lacertidae) et de Trachylepis quinquetaeniata (Lichtenstein, 1823) (Squamata, Scincidae) dans l`Ennedi central (Tchad). - Bulletin de la Société Herpétologique de France, 157: 41-44.
Vonesh, J.R. (1998) - The amphibians and reptiles of Kibale forrest, Uganda: Herpetofaunal survey and ecological study of the forrest floor litter community. - M.Sc.. Thesis, Department of Zoology, University of Florida. University of Florida. 101 pp.
Vonesh, J.R. (2001) - Patterns of Richness and Abundance in a Tropical African Leaf-litter Herpetofauna. - BIOTROPICA, 33 (3): 502-510.
Wahungu, G.M. & Mumia, E.N. & Nzau, V.N. (2004) - An analysis of the niche of two sympatric lizard species Gerrhosaurus flavigularis and Latastia longicaudata at an arid savannah habitat in Kenya. . - African Journal of Ecology, Oxford, 42 (4): 368-371.
Werner, F. (1908) - Reptilien und Amphibien. - Sammlung Göschen, Das Tierreich Band III, Leipzig, 180 pp.