1. BLOCK, M. IV The blood forming tissus and blood of newborn opossum (Didelphis marsupialis). Ergebnisse Anatomische Entwicklugsgeshichte, 37:237-366, 1964.
2. BUCHER, J. E. & FRITZ, H. I. Behavior and maintenance of the woolly opossum (Caluromys) in captivity. Laboratory Animal Science, 27(6):1007-1012, 1977.
3. DE SCORZA, C.; HERRERA, L. & URDANETA-MORALES, S. Trypanosoma (Schizotryopanum) cruzi: Histopathology in mice infected with isolates from Didelphis marsupialis from the valley of Caracas. Acta Cientifica Venezuelana, 47(4):244-247, 1996.
4. FELDMAN, D. B. & ROSS, P. W. Methods for obtaining neonates of Known age from the Virginia opossum (Didelphis marsupialis virginiana). Laboratory Animal Science, 25(4):437-439, 1975.
5. HARDER, J. D. & FLEMING, M. W. Husbandry of a small breeding colony of opossums (Didelphis virginiana). Laboratory Animal Science, 32(5):547-549, 1982.