1. Optimal bird migration revisited;Alstram;Journal of Ornithology,2011
2. El Buitre Negro. Colección GREA # 4. Grupo para la Recuperación de la Fauna Autóctona y su Hábitat and Central Hispano;Álvarez,1997
3. Nesting ecology and breeding success of black vultures (Aegypius monachus) in central Mongolia;Batbayar,2004
4. Movement patterns of Cinereous Vultures in Mongolia;Batbayar;Falco,2008
5. Aegypius monachus. The IUCN red list of threatened species 2018: e.T22695231A131935194;BirdLife International,2018