Madsen, F.J.; Hansen, B. (1994). Echinodermata Holothurioidea. Marine invertebrates of Scandinavia, 9. Scandinavian University Press: Oslo. ISBN 82-00-03936-6. 143 pp.
Part of: Brattegard, T.; Sneli, J.-A.; Christiansen, M.E. (Ed.) Marine invertebrates of Scandinavia.