1. Balazs, E.A. (Ed.): Chemistry and biology of the intercellular matrix, Vol. 1. 698 pp. New York: Academic Press 1970
2. Borg, F.: Studies on recent cyclostomatous Bryozoa. Zool. Bidr. Upps. 10, 181–507 (1926)
3. Brien, P.: Classe des bryozoaires. Traité Zool. 5, 1054–1335 (1960)
4. Bronstein, G.: Étude du système de quelques bryozoaires gymolémides. Trav. Stn biol. Roscoff 5, 155–174 (1937)
5. Bullivant, J.S.: Release of sperm by Bryozoa. Ophelia 4, 139–142 (1967)