Literature
  • 1780
  • Fauna Groenlandica. Hafniae et Lipsiae.
  • , 1978
  • Fauna marina de Galicia. II. Contribución al conocimiento de Poríferos del litoral gallego. Monogr. Univ. Santiago Compostela: 1-68.
  • 1987
  • Field characteristics of some conspicuous sublittoral sponges from Roaringwater Bay, County Cork, Ireland: 130-140. In: W. C. Jones (ed.), European contributions to the taxonomy of sponges. Publ. Sherkin Isl. Marine Station, 1: 140 pp.
  • 1976
  • First European record of Haliclona loosanoffi Hartman, 1958 (Porifera, Haplosclerida), a species hitherto known only from the New England coast (U.S.A.). Beaufortia, 24: 177-188, pl. I.
  • , 1988
  • Five Kingdoms. W. H. Freeman and Company, New York. 376 pp.
  • 1981
  • Form and distribution of silica in sponges: 453-493. In: T.L. Simpson &n B.E. Volcani, eds. Silicon and siliceous structures in biological systems. Springer Verlag, New York.
  • , 1969
  • Free amino acid patterns and the classification of the Demospongiae. Mar. Biol., 3 (3): 247-268.
  • , 1969
  • Free amino acid patterns in Demospongiae: a biochemical approach to sponge classification. Cah. Biol. Mar., 10: 205-220