^ abcdAlfred L. Gardner, "Order Didelphimorphia," Mammal Species of the World, (3rd ed.), Volume 1, Don E. Wilson & DeeAnn M. Reeder (ed.), Volume 1, Johns Hopkins University Press, 2005, Pages 3 - 18.
^ abcFrederick S. Szalay, “Taxa and phylogeny of Metatheria,” Evolutionary History of the Marsupials and an Analysis of Osteological Characters, Cambridge University Press, 1994, 277-406.
^ abRobert S. Voss & Sharon A. Jansa, “Metetheria and Marsupialia,” Opossums: An Adaptive Radiation of New World Marsupials, Johns Hopkins University Press, 2021, Pages 7-13.
^ abRoberts S. Voss & Shalon A. Jansa, "Classification," Phylogenetic Relationships and Classification of Didelphid Marsupials, an Extant Radiation of New World Metatherian Mammals, American Museum of Natural History, 2009, Pages 81 - 142.