Literature
  • Pechenik 1996
  • Biology of the invertebrates. Times Mirror Higher Education Group, Inc., Dubuque, 554 pp.
  • 1912
  • Die Cephalopoden der Plankton-Expedition. Ergeb. Plankton-Exped. Humboldt-Stiftung., 2: 1-815 & Atlas.
  • Poppe, Goto 1991
  • European Seashells. Vol. I. 352 pp. Wiesbaden/Verlag Christa Hemmen.
  • Poppe, Goto 1993
  • European Seashells. Vol. II. 221 pp. Wiesbaden/Verlag Christa Hemmen.
  • Postma, Kleijn 1957
  • Het Strand in Kleuren. Meulenhoffs Natuugidsen, Amsterdam.