J. Rle B.  Tomlin, ?New Malay land-shells?, Proceedings of the Malacological Society of London, vol. 27, pp. 224-225, 1948.

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.