Literature
  • McMillan 1968
  • : British Shells. Wayside and Woodlands Series. Frederick Warne & CO. LTD, London/New York.
  • Mifsud 1996
  • Living Mollusca from circalittoral coastal muds, off Western Malta. La Conchiglia. Supplement to issue n. 279.
  • 1959
  • Skallus Søtaender Blaeksprutter. Danmarks Fauna, 65. Dansk Naturhistorisk Forening.