1. Note on the generic names Didelphis and Philander;Allen;Bull. Am. Mus. Nat. Hist.,1900
2. A preliminary study of the North American opossums of the genus Didelphis;Allen;Bull. Am. Mus. Nat. Hist.,1901
3. Bemerkungen uber ein Wollopossum, Caluromys laniger (Desmarest);Altman;Zool. Garten (Leipzig),1968
4. “Recent Mammals of the World—Synopsis of Families.”,1967
5. “Patterns of Mammalian Reproduction,”;Asdell,1964