Reference

Stefano Taiti, Franco Ferrara, Andreas Allspach (1997/1998): On three species of Periscyphis Gerstaecker, 1873 from Kenya, Sudan and Oman (Crustacea: Isopoda: Oniscidea) – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 47: 1 - 11.