Literature
- Jones, A.M. & J.M. Baxter 1987. Molluscs: Caudofoveata, Solenogastres, Polyplacophora and Scaphopoda. Synopses of the British fauna (NS), 37: 1-123.
- Poppe, G.T. & Y. Goto 1991. European Seashells. Vol. I. 352 pp. Wiesbaden/Verlag Christa Hemmen.
- Salvini-Plawen, L. v. 1975. Mollusca Caudofoveata. Marine Invertebrates of Scandinavia. No. 4. The Norwegian Research Council for Science and Humanities.