Savigny, Marie Jules César (1809). Description de l'Égypte: Histoire naturelle (in French). Vol. 1. Paris: Imprimerie impériale. pp. 68, 71. /wiki/Marie_Jules_C%C3%A9sar_Savigny
Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-List of Birds of the World. Vol. 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 305. /wiki/Ernst_Mayr
Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 183. ISBN 978-1-4081-2501-4. 978-1-4081-2501-4
Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (August 2022). "Hoatzin, New World vultures, Secretarybird, raptors". IOC World Bird List Version 12.2. International Ornithologists' Union. Retrieved 2 December 2022. /wiki/Frank_Gill_(ornithologist)
Hablitz, C. L. (1783). "Vultur fulvus Briss". Neue nordische Beyträge zur physikalischen und geographischen Erd- und Völkerbeschreibung, Naturgeschichte und Oekonomie. 4: 58–59. https://gdz.sub.uni-goettingen.de/id/PPN332461483_0004?tify={%22pages%22:%5b62%5d,%22view%22:%22info%22}
BirdLife International (2017). "Gyps fulvus". IUCN Red List of Threatened Species. 2017: e.T22695219A118593677. /wiki/BirdLife_International
Gmelin, J. F. (1788). "Vultur bengalensis". Caroli a Linné, Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Vol. I (13th aucta, reformata ed.). Lipsiae: Georg Emanuel Beer. pp. 245–246. https://archive.org/details/carolialinnsyst00linngoog/page/n259/mode/2up
BirdLife International (2017). "Gyps bengalensis". IUCN Red List of Threatened Species. 2017: e.T22695194A118307773. https://www.iucnredlist.org/species/22695194/118307773
Forster, J. R. (1798). "Le Chasse-siente, der Rothjäger. No. 10 (V. Coprotheres)". F. le Vaillant's Naturgeschichte der afrikanischen Vögel. Halle: Bey Fried. Christoph Dreyssig. pp. 35–37. https://archive.org/details/flevaillantsnatu00leva/page/n71/mode/2up
BirdLife International (2021). "Gyps coprotheres". IUCN Red List of Threatened Species. 2021: e.T22695225A197073171. doi:10.2305/IUCN.UK.2021-3.RLTS.T22695225A197073171.en. Retrieved 10 December 2021. https://www.iucnredlist.org/species/22695225/197073171
Scopoli, J. A. (1786–88). "Aves". Deliciae Flora et Fauna Insubricae Ticini. An account including new descriptions of the birds and mammals collected by Pierre Sonnerat on his voyages. London: C. J. Clay. pp. 7–18. https://archive.org/details/cu31924005326800/page/n13/mode/2up
BirdLife International (2017). "Gyps indicus". IUCN Red List of Threatened Species. 2017: e.T22729731A117875047. https://www.iucnredlist.org/species/22729731/117875047
Gray, G.R. (1844). "Vulturinae, or Vultures". The genera of birds : comprising their generic characters, a notice of the habits of each genus, and an extensive list of species referred to their several genera. Vol. 1. London: Longman, Brown, Green, and Longmans. pp. 5–6. https://archive.org/details/generabirdsIGray/page/6/mode/2up
BirdLife International (2017). "Gyps tenuirostris". IUCN Red List of Threatened Species. 2017: e.T22729460A117367614. https://www.iucnredlist.org/species/22729460/117367614
Brehm, A. (1852). "Beiträge zur Ornithologie Nord-Ost Afrikas, mit besonderer Rücksicht auf die in Europa vorkommenden Arten der Vögel". Naumannia. 2 (3): 38–51. https://archive.org/details/naumanniaarchivf02deut/page/44/mode/2up
BirdLife International (2017). "Gyps rueppelli". IUCN Red List of Threatened Species. 2017: e.T22695207A118595083. https://www.iucnredlist.org/species/22695207/118595083
Salvadori, T. (1865). "Descrizione di una nuova species d'Avoltojo (Gyps africana)". Gazzetta Ufficiale del Regno d'Italia (126): 1. http://augusto.agid.gov.it/gazzette/index/download/id/1865126_PM
BirdLife International (2018). "Gyps africanus". IUCN Red List of Threatened Species. 2018: e.T22695189A126667006. /wiki/BirdLife_International
Hume, A. O. H. (1869). "Gyps fulvus, Gmel. (Gyps himalayensis, nobis.)". My scrap book: or rough notes on Indian oology and ornithology. Calcutta: C.B. Lewis, Baptist Mission Press. pp. 12–18. https://archive.org/details/myscrapbookorrou00hume/page/12/mode/2up
BirdLife International (2016). "Gyps himalayensis". IUCN Red List of Threatened Species. 2016: e.T22695215A118594518. https://www.iucnredlist.org/species/22695215/118594518
Lydekker, R. (1890). "On the remains of some large extinct birds from the cavern-deposits of Malta". Proceedings of the Zoological Society of London. 28 (III): 403–411. https://archive.org/details/proceedingsofgen90scie/page/404/mode/2up
Marco, A. S. (2007). "New occurrences of the extinct vulture Gyps melitensis (Falconiformes, Aves) and a reappraisal of the paleospecies". Journal of Vertebrate Paleontology. 27 (4): 1057–1061. doi:10.1671/0272-4634(2007)27[1057:NOOTEV]2.0.CO;2. S2CID 198131101. /wiki/Doi_(identifier)
Boev, Z. (2010). "Gyps bochenskii sp. n. (Aves: Falconiformes) from the Late Pliocene of Varshets (NW Bulgaria)". Acta Zoologica Bulgarica. 62 (2): 211–242. https://www.researchgate.net/publication/297836235