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Wink M, Sauer-Gürth H. Advances in the molecular systematics of African Raptors. Chancellor RD, Meyburg B-U (编). Raptors at Risk(PDF). WWGBP/HancockHouse. 2000: 135–147 [2024-08-19]. (原始内容存档(PDF)于2011-06-07).
Wink M, Sauer-Gürth H. Advances in the molecular systematics of African Raptors. Chancellor RD, Meyburg B-U (编). Raptors at Risk(PDF). WWGBP/HancockHouse. 2000: 135–147 [2024-08-19]. (原始内容存档(PDF)于2011-06-07).