Bourdon, E. (2005). “Osteological evidence for sister group relationship between pseudo-toothed birds (Aves: Odontopterygiformes) and waterfowls (Anseriformes)”. Naturwissenschaften. 92 (#12): 586–91. Bibcode:2005NW.....92..586B. doi:10.1007/s00114-005-0047-0. PMID16240103.
Bourdon, E. (2005). “Osteological evidence for sister group relationship between pseudo-toothed birds (Aves: Odontopterygiformes) and waterfowls (Anseriformes)”. Naturwissenschaften. 92 (#12): 586–91. Bibcode:2005NW.....92..586B. doi:10.1007/s00114-005-0047-0. PMID16240103.
Bourdon, E. (2005). “Osteological evidence for sister group relationship between pseudo-toothed birds (Aves: Odontopterygiformes) and waterfowls (Anseriformes)”. Naturwissenschaften. 92 (#12): 586–91. Bibcode:2005NW.....92..586B. doi:10.1007/s00114-005-0047-0. PMID16240103.