* Wink, M.; Döttlinger, H.; Nicholls, M. K. & Sauer-Gürth, H. (2000): Phylogenetic relationships between Black Shaheen ("Falco peregrinus peregrinator"), Red-naped Shaheen ("F. pelegrinoides babylonicus") and Peregrines ("F. peregrinus").
* Wink, M.; Döttlinger, H.; Nicholls, M. K. & Sauer-Gürth, H. (2000): Phylogenetic relationships between Black Shaheen ("Falco peregrinus peregrinator"), Red-naped Shaheen ("F. pelegrinoides babylonicus") and Peregrines ("F. peregrinus").