Literature
- Brusca, R.C. and G.J. Brusca 1990. Invertebrates. Sinauer Associates Inc., Sunderland, U.S.A. 922 pp.
- Hansson, H.G. 1998a. NEAT (North East Atlantic Taxa): South Scandinavian marine Cnidaria and Ctenophora checklist. Internet PDF Edition, August 1998. [www.tmbl.gu.se].
- Hayward, P.J. and J.S. Ryland 1990. Handbook of the Marine Fauna of North-West Europe. Oxford University Press, Oxford.
- Hayward, P.J. and J.S. Ryland 1995. Handbook of the Marine Fauna of North-West Europe. Oxford University Press, Oxford. 800pp.