J. Delacour: The Significance of the Number of Toes in Some Woodpeckers and Kingfishers. In: The Auk. Band68, Nr.1, 1. Januar 1951, ISSN0004-8038, S.49–51, doi:10.2307/4080797.
Ben D. Marks, David E. Willard: Phylogenetic Relationships of the Madagascar Pygmy Kingfisher (Ispidina Madagascariensis). In: The Auk. Band122, Nr.4, 1. Oktober 2005, ISSN1938-4254, S.1271–1280, doi:10.1093/auk/122.4.1271.
Robert G. Moyle, Jérôme Fuchs, Eric Pasquet, Ben D. Marks: Feeding behavior, toe count, and the phylogenetic relationships among alcedinine kingfishers (Alcedininae). In: Journal of Avian Biology. Band38, Nr.3, 2007, ISSN0908-8857, S.317–326, doi:10.1111/J.2007.0908-8857.03921.x.
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J. Delacour: The Significance of the Number of Toes in Some Woodpeckers and Kingfishers. In: The Auk. Band68, Nr.1, 1. Januar 1951, ISSN0004-8038, S.49–51, doi:10.2307/4080797.
Ben D. Marks, David E. Willard: Phylogenetic Relationships of the Madagascar Pygmy Kingfisher (Ispidina Madagascariensis). In: The Auk. Band122, Nr.4, 1. Oktober 2005, ISSN1938-4254, S.1271–1280, doi:10.1093/auk/122.4.1271.
Robert G. Moyle, Jérôme Fuchs, Eric Pasquet, Ben D. Marks: Feeding behavior, toe count, and the phylogenetic relationships among alcedinine kingfishers (Alcedininae). In: Journal of Avian Biology. Band38, Nr.3, 2007, ISSN0908-8857, S.317–326, doi:10.1111/J.2007.0908-8857.03921.x.