5 literature references for Stelligera rigida (Montagu, 1818):

Author: Hayward, P.J.; Ryland, J.S. (Ed.)
Year: 1990
Title: The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods.
Source: Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp.
Author: Müller, Y.
Year: 2004
Title: Faune et flore du littoral du Nord, du Pas-de-Calais et de la Belgique: inventaire. [Coastal fauna and flora of the Nord, Pas-de-Calais and Belgium: inventory].
Source: Commission Régionale de Biologie Région Nord Pas-de-Calais: France. 307 pp.
Author: Van Soest, R.W.M.
Year: 2001
Title: Porifera, in: Costello, M.J. et al. (Ed.) (2001).
Source: European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50:
Author: Boury-Esnault, N.; Pansini, M.; Uriz, M.J.
Year: 1994
Title: Spongiaires bathyaux de la mer d’Alboran et du golfe ibéro-marocain.
Source: Mémoires du Muséum national d’Histoire naturelle 160: 1-174.
Author: Montagu, G.
Year: 1818
Title: An Essay on Sponges, with Descriptions of all the Species that have been discovered on the Coast of Great Britain.
Source: Memoirs of the Wernerian Natural History Society 2(1): 67-122,pls III-XVI.