W. S. S.  van Benthem-Jutting, ?The Malayan species of Opisthostoma (Gastropoda, Probranchia, Cyclophoridae), with a catalogue of all the species hitherto described?, The Bulletin of the Raffles Museum, vol. 24, pp. 5-61, 1952.

W. S. S.  van Benthem-Jutting, ?Additional new species and new localities of the family Vertiginidae and the genera Oophana and Opisthostoma from Malaya?, The Bulletin of the Raffles Museum, vol. 26, pp. 34-48, 1961.