Heessen, H.J.L. & Daan, N. & Ellis, J.R. (2015)
Fish atlas of the Celtic Sea, North Sea, and Baltic Sea. Based on international research-vessel surveys. Wageningen Academic Publishers. 572 pp. ISBN 978-90-8686-266-5.(Chondrichthyes pp. 60-126).
DOI: 10.3920/978-90-8686-878-0
Heessen, H.J.L. & Daan, N. & Ellis, J.R. (2014)
Elasmobranchs of the North-East Atlantic Shelf [Abstract]. In Proceedings of the European Elasmobranch Association annual scientific conference, Leeuwarden: 46
Daan, N. & Heessen, H. & Hofstede, R. (2005)
North Sea elasmobranchs: distribution, abundance and biodiversity. ICES CM Documents 2005, 6, 1–15
Walker, P. & Howlett, G. & Millner, R. & Van Leeuwen, P. & Daan, N. (1996)
The sensitive skate and fisheries - a North Sea perspective [Abstract]. American Elasmobranch Society 12th Annual Meeting, June 13–19,1996 New Orleans, Louisiana, U.S.A.