E. A.  Smith, ?On a collection of land-shells from Sarawak, British North Borneo, Palawan, and other neighbouring islands?, Proceedings of the Zoological Society of London, vol. 1895, pp. 97?127, 1895.

W.  Kobelt, Die Familie der Heliceen. 1905, pp. 861?1225.

T. - S.  Liew, Schilthuizen, M., and Vermeulen, J. J., ?Systematic Revision of the Genus Everettia Godwin-Austen, 1891 (Mollusca: Gastropoda: Dyakiidae) in Sabah, Northern Borneo?, Zoological Journal of the Linnean Society, vol. 157, pp. 515-550, 2009.