Literature
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- Hoffmann, H. 1926. Opisthobranchia. In Grimpe, G. & Wagner, E.: Die Tierwelt der Nord- und Ostsee.
- Poppe, G.T. & Y. Goto 1991. European Seashells. Vol. I. 352 pp. Wiesbaden/Verlag Christa Hemmen.
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