CICERELLO, R.R. & SCHUSTER, G.A. (2003): A guide to the freshwater mussels of Kentucky. – Kentucky State Nature Preserves Commission, Scientific and Technical Series Number 7: iii + 62 pp. Frankfort. [ISBN 0- 9673646-6-3]. R. EGOROV & K. GREKE (2003): Terrestrial Pectinibranchia. Helicinidae, Cyclophoridae, Diplommatinidae, Cochlostomatidae, Aciculidae, Tateidae, Terrestribythinellidae, Pomatiidae. – Treasure of Russian Shells, 6: 1-43. Moscow (Colus-Doverie Ltd.). [ISSN 1025-2517].