Grell, K.G., Ruthmann, A. (1991) Placozoa. In: Harrison FW, Westfall, J.A., editor. Microscopic Anatomy of Invertebrates, Placozoa, Porifera, Cnidaria, and Ctenophora. New York: Wiley-Liss. pp. 13-28
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Grell, K. G.; Ruthmann, A.
1991
Placozoa
Microscopic Anatomy of Invertebrates, Placozoa, Porifera, Cnidaria, and Ctenophora