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Raven, J. G. M. (1990). A revision of Obscurella Clessin, 1889 (Gastropoda Prosobranchia: Cyclophoridae). Basteria. 54 (1/3): 17-62. Leiden [1 June].
Raven, J. G. M. (1990). A revision of Obscurella Clessin, 1889 (Gastropoda Prosobranchia: Cyclophoridae). Basteria. 54 (1/3): 17-62. Leiden [1 June].
