N. G.  Vinogradova, ?On the finding of a new ascidian species Cnemidocarpa zenkevitchi in the Fiord of the Banger Oasis (Antarctic) (in Russian)?, Zoologicheskii Zhurnal, vol. 37, no. 9, pp. 1375-1379, 1958.

A. V.  Ivanov, ?A new aberrant ascidian Oligotrema laethmobia sp. n., and taxonomic rank of the group Sorberacea?, Zoologicheskii Zhurnal, vol. 72, no. 7, pp. 104-115, 1993.

V. N.  Romanov, ?Didemnidae (Ascidiacea) in the sublitoral zone of the Iturup Islands?, Zoologicheskii Zhurnal, vol. 53, pp. 237-243, 1974.