Brodkorb, Pierce (1976): Discovery of a Cretaceous bird, apparently ancestral to the orders Coraciiformes and Piciformes (Aves: Carinatae). Smithsonian Contributions to Paleobiology27: 67-73. PDF fulltext (File size 70MB!)Archiválva2012. október 7-i dátummal a Wayback Machine-ben
Brodkorb, Pierce (1976): Discovery of a Cretaceous bird, apparently ancestral to the orders Coraciiformes and Piciformes (Aves: Carinatae). Smithsonian Contributions to Paleobiology27: 67-73. PDF fulltext (File size 70MB!)Archiválva2012. október 7-i dátummal a Wayback Machine-ben