Schmidl, Dieter Verhaltensphysiologie, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Helbig, A. J., Seibold, I., Bednarek, W., Brüning, H., Gaucher, P., Ristow, D., et al. (1994). Phylogenetic relation-ships among Falcon species (genus Falco) according to DNA sequence variation of the cytochrome b gene. In B.-U. Meyburg, & R. D. Chancellor (Eds.), Raptor conservation today (pp. 593-599). London: The Pica Press.