Benthem Jutting, W. S. S. van. (1950). The Malayan species of
Boysidia,
Paraboysidia,
Hypselostoma and
Gyliotrachela (Gastropoda, Pulmonata, Vertiginidae) with a catalogue of all the species hitherto described.
Bulletin of the Raffles Museum. 21: 5-47.