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Hooper, J.N.A.; Van Soest, R.W.M. (2002). Class Demospongiae Sollas, 1885. pp. 15-18 in: Hooper, J.N.A.; van Soest, R.W.M. (Eds.) Systema Porifera: a guide to the classification of sponges. Volume 1 (Kluwer Academic/ Plenum Publishers: New York, Boston, Dordrecht, London, Moscow).