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Manuel, M.; Borojevic, R.; Boury-Esnault, N.; Vacelet, J. (2002). Class Calcarea Bowerbank, 1864, in: Hooper, J.N.A.; Van Soest, R.W.M. (Ed.) (2002). Systema Porifera: a guide to the classification of sponges. pp. 1103-1110