Literature
- Hayward, P.J., Wigham, G.D. & N. Yonow 1990. Mollusca I: Polyplacophora, Scaphopoda, and Gastropoda. In: The Marine Fauna of the British Isles and North-West Europe. (ed. P.J. Hayward & J.S. Ryland). Clarendon Press, Oxford: 628-730.
- Poppe, G.T. & Y. Goto 1991. European Seashells. Vol. I. 352 pp. Wiesbaden/Verlag Christa Hemmen.
- Thompson, T.E. 1988. Molluscs: Benthic Opisthobranchs (Mollusca: Gastropoda). Synopses of the British fauna (NS), 8: 1-356.