1. Huxley, T. H. Upon animal individuality. Proc. Roy. Inst. Lond. 1, 184–89 (1852).
2. Ryland, J. S. Structural and physiological aspects of coloniality. Syst. Assoc. Spec. 11, 211–242 (1979).
3. McKinney, F. K. & Jackson, J. B. C. Bryozoan Evolution (Unwin Hyman 1989).
4. Rucker, J. B. & Carver, R. E. A survey of the carbonate mineralogy of cheilostome Bryozoa. J. Paleontology 43, 791-799 (1969).
5. Taylor, P. D., Kudryavtsev, A. B. & Schopf, J. W. Calcite and aragonite distributions in the skeletons of bimineralic bryozoans as revealed by Raman spectroscopy. Invertebr. Biol. 127, 87–97 (2008).