Template:Gamauf & Haring, 2004
Gamauf, A., & Haring, E. (2004). Molecular phylogeny and biogeography of Honey-buzzards (genera Pernis and Henicopernis). Journal of Zoological Systematics and Evolutionary Research 42 (2): 145–153. DOI: 10.1111/j.1439-0469.2004.00250.x