E. A.  Smith, ?Descriptions of new species of land-shells from Borneo?, Journal of the Proceedings of the Linnean Society. Zoology, vol. 24, pp. 341-352, 1893.

E. A.  Smith, ?Note on the Genera Geothauma and Gyrostropha?, The annals and magazine of natural history, including zoology, botany and geology, vol. 6, pp. 284-285, 1893.