Caldwell, Michael; Konishi, Takuya (2007). "Taxonomic re-assignment of the first-known mosasaur specimen from Japan, and a discussion of circum-pacific mosasaur paleobiogeography". Journal of Vertebrate Paleontology. 27 (2): 517–520. doi:10.1671/0272-4634(2007)27[517:trotfm]2.0.co;2.