Yamazaki, M., Yamazaki, K., Rundell, R.J. & Ueshima, R. (2015)

Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia

. Zootaxa, 4057 (4), 511–538.