Ackers, R.G., D. Moss, B.E. Picton and S.M.K. Stone, 1985. Sponges of the British Isles ("Sponge IV"). I. Marine Conservation Soc., Ross on Wye, U.K.: 1-107. Ackers, R.G.A., D. Moss and B.E. Picton, 1992. Sponges of the British Isles ("Sponge V"), a colour guide and working document. Marine Conservation Society, 175 pp. Brøndsted, H.V., 1932. Marine Spongia. The Zoology of the Faroes, 1 (1, III): 1-34. Burton, M., 1963. A revision of the classification of the calcareous sponges. British Museum (Natural History), London. 693 pp. Schmidt, O., 1869. Vorläufige Mittheilungen über die Spongien der Grönlandischen Küste. Mitt. Steiermärk. Gew. Ver., 2 (1): 89-97. |