Fikáček, M., Hebauer, F. and Hansen, M. (2009) “Taxonomic revision of New World species of the genus Oosternum Sharp (Coleoptera: Hydrophilidae: Sphaeridiinae) I. Definition of species groups and revision of the Oosternum aequinoctiale group”, Zootaxa. Auckland, New Zealand, 2054(1), pp. 1–37. doi: 10.11646/zootaxa.2054.1.1.