H. H.  Godwin-Austen, ?On a Collection of Land-Shells made in Borneo by Mr. A. Everett, with Descriptions of supposed new species. Part I.?, Proceedings of the scientific meetings of the Zoological Society of London, pp. 332-355, 1889.

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.

E.  von Martens, ?Beschreibung einiger im östlichen Borneo von Dr. Martin Schmidt gesammelten Land und Süßwasser-Conchylien.?, Mitteilungen aus dem Zoologischen Museum, vol. 4, pp. 251-291, 1908.