K.-P. Koepfli, M. E. Gompper, E. Eizirik, C.-C. Ho, L. Linden, J. E. Maldonado, R. K. Wayne. Phylogeny of the Procyonidae (Mammalia: Carvnivora): Molecules, morphology and the Great American Interchange. Molecular Phylogenetics and Evolution. 2007, 43: 1076–1095. doi:10.1016/j.ympev.2006.10.003.