Steiner, C.; et al. New DNA data from transthyretin nuclear intron suggest an Oligocene to Miocene diversification of living South American opossums (Marsupialia: Didelphidae). Molecular Phylogenetics and Evolution. 2005, 35: 363–379. PMID 15804409. doi:10.1016/j.ympev.2004.12.013.
Steiner, C.; et al. New DNA data from transthyretin nuclear intron suggest an Oligocene to Miocene diversification of living South American opossums (Marsupialia: Didelphidae). Molecular Phylogenetics and Evolution. 2005, 35: 363–379. PMID 15804409. doi:10.1016/j.ympev.2004.12.013.