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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, 1894.

E. A.  Smith, ?On the land-shells of the Natuna Islands?, The annals and magazine of natural history, including zoology, botany and geology, vol. 6, pp. 453-463, 1894.

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.