BioStor
 | Anatomical And Nomenclatural Notes On Opossums R H Pine (1973) Proceedings of The Biological Society of Washington 86: 391-402 |
 | The Neotropical orb-weaving spiders of the genus Alpaida (Araneae: Araneidae) H W Levi (1988) Bulletin of The Museum of Comparative Zoology 151: 365-487 |
 | The neotropical orb-weaver genus Metazygia (Araneae: Araneidae H W Levi (1995) Bulletin of The Museum of Comparative Zoology 154: 63-151 |
 | The neotropical and Mexican orb weavers of the genera Cyclosa and Allocyclosa (Araneae, Araneidae) H W Levi (1999) Bulletin of The Museum of Comparative Zoology 155: 299-379 |
 | Atlas of New World marsupials Barbara E Brown (2004) Fieldiana Zoology 102: 1-308 |