Simões-Lopes, P. C., and C. S. Gutstein. “Notes on the Anatomy, Positioning and Homology of the Pelvic Bones in Small Cetaceans (Cetacea, Delphinidae, Pontoporiidae)”. Latin American Journal of Aquatic Mammals, vol. 3, no. 2, Dec. 2004, pp. 157-62, doi:10.5597/lajam00060.