World Register of Marine Species (WoRMS)
MolluscaBase eds. (2026). MolluscaBase. Kokenospira retifera Öpik, 1930&nbsp;&#8224;. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1815808 on 2026-08-25
Öpik, A. (1930). Beiträge zur Kenntnis der Kukruse-(C2-C3-)Stufe in Eesti. IV. Tartu Ülikooli Geoloogia-Instituudi Toimetised / Publications of the Geological Institution of the Unviersity of Tartu. 24: 1–34.