S.  Van Der Spoel, Pseudothecosomata, gymnosomata and heteropoda (gastropoda). Amsterdam: Bohn, Scheltema & Holkeme Utrecht, 1976, p. 484.

A.  Pruvot-Fol, ?Les Gymnosomes I. Carlsberg Foundation?s Oceanographical Expedition Round the World 1928-30 and Previous "Dana"-Expeditions?, pp. 11-47, 1942.