Zhang, Z.; Huang, Y.; James, H. F.; Hou, L. (2012). "Two Old World vultures from the middle Pleistocene of northeastern China and their implications for interspecific competition and biogeography of Aegypiinae". Journal of Vertebrate Paleontology32: 117–124. doi:10.1080/02724634.2012.624146.
Li, Zhiheng; Clarke, Julia A.; Zhou, Zhonghe; Deng, Tao (October 2016). "A new Old World vulture from the late Miocene of China sheds light on Neogene shifts in the past diversity and distribution of the Gypaetinae" (in en). The Auk133 (4): 615–625. doi:10.1642/AUK-15-240.1. பன்னாட்டுத் தர தொடர் எண்:0004-8038.
Li, Zhiheng; Clarke, Julia A.; Zhou, Zhonghe; Deng, Tao (October 2016). "A new Old World vulture from the late Miocene of China sheds light on Neogene shifts in the past diversity and distribution of the Gypaetinae" (in en). The Auk133 (4): 615–625. doi:10.1642/AUK-15-240.1. பன்னாட்டுத் தர தொடர் எண்:0004-8038.