Literature
- Muus, B.J. 1959. Skallus, Søtaender, Blaeksprutter. Danmarks Fauna, Band 65. 239 pages, 117 figs. Gads Forlag, København.
- Muus, B.J. 1963c. Cephalopoda. Sub-order: Tethoidea. Families Ommastrephidae, Chiroteuthidae, Cranchiidae. Fiches d'Identification du Zooplancton, 97 (1963). Conseil International pour l'Exploration de la Mer, Kopenhagen.
- Nesis, K.N. 1987. Cephalopods of the world. T.F.H. Publications Inc., Neptune City, U.S.A.
- Pfeffer, G. 1908. Die Cephalopoden. Nordisches Plankton, 2(4): 9-116. Lipsius & Tischer, Kiel. (Reprint Asher & Co., Amsterdam, 1964).
- Pfeffer, G. 1912. Die Cephalopoden der Plankton-Expedition. Ergeb. Plankton-Exped. Humboldt-Stiftung., 2: 1-815 & Atlas.
- Sweeney, M.J., F.E.R. Roper, K.M. Mangold, M.R. Clarke and S. v. Boletzky (editors) 1992. "Larval" and juvenile cephalopods: a manual for their identification. Smith. Contr. Zool., 513: 1-282.
- de Kluijver, M., S. Ingalsuo and R. de Bruyne, 2000. Macrobenthos of the North Sea. Vol. I - Keys to Mollusca and Brachiopoda. World Biodiversity database, CD-ROM Series. Expert Centre for Taxonomic Identifications (ETI), University of Amsterdam, Amsterdam. .