A.  Solem, ?A collection of Non-marine mollusks from Sabah, Malaysia?, Sabah Society Journal, vol. 2, pp. 1-40, 1964.

R. A. M.  Brandt, ?The non-marine aquatic Mollusca of Thailand?, Archiv für Molluskenkunde, vol. 105, pp. 1-423, 1974.

J. J.  Vermeulen, ?Bukit Sarang (Sarawak, Malaysia), an isolated limestone hill with an extraordinary snail fauna?, Basteria, vol. 71, pp. 209-220, 2007.