Hooper, J.N.A.; Van Soest, R.W.M.; Debrenne, F. (2002). Phylum Porifera Grant, 1826. Pp. 9-14 <i>In:</i> Hooper, J.N.A.; van Soest, R.W.M. (Eds.) (2002) <i>Systema Porifera: a guide to the classification of sponges</i>. (2 Volumes) Kluwer Academic/ Plenum Publishers: New York, Boston, Dordrecht, London, Moscow). 1708 + xvliii. ISBN 0-306-47260-0 (printed version). (look up in IMIS) [details]