World Register of Marine Species (WoRMS)
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2026). World Foraminifera Database. Circus laevigatus Voloshinova, 1961&nbsp;&#8224;. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=908589 on 2026-08-29
Voloshinova, N. A.; Budasheva, A. I. (1961). Lituolidy i trokhamminidy iz Tretichnykh otlozheniy ostrova Sakhalina i poluostrova Kamchatki [ Lituolidae and Trochamminidae from Tertiary strata of Sakhalin Island and Kamchatka Peninsula]. Trudy Vsesoyuznogo Neftyanogo Nauchno·issledovatelskogo Geologo· razvedochnogo Instituta (VNIGRI) (Mikrofauna SSSR Sbornik 12). 170:169-233.