Reference

Dirk H. R. Spennemann, Guenther Rapp (1989): Can Rats Colonise Oceanic Islands Unaided? An Assessment and Review of the Swimming Capabilities of the Genus Rattus with Particular Reference to Tropical Waters (Mammalia, Rodentia: Muridae) – Zoologische Abhandlungen - Staatliches Museum für Tierkunde Dresden – 45: 81 - 91.