Class Calcarea Bowerbank, 1864
Manuel, M.; Borojevic, R.; Boury-Esnault, N.; Vacelet, J. (2002). Class Calcarea Bowerbank, 1864, in: Hooper, J.N.A. et al. (Ed.) Systema Porifera: a guide to the classification of Sponges. pp. 1103-1110
In: Hooper, J.N.A.; Van Soest, R.W.M. (Ed.) (2002). Systema Porifera: A guide to the classification of Sponges. Kluwer Academic/Plenum Publishers: New York. ISBN 0-306-47260-0. 2 vols. pp., meer
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