1. Cell Sorting Out: The Self-Assembly of TissuesIn Vitro
2. G.M. Edelman, Topobiology, Basic Books, New York, 1988, p. 129.
3. Models for Embryonic Periodicity;Held,1994
4. S.A. Kauffman, The Origins of Order, Oxford University Press, Oxford, 1993, p. 537.
5. The chemical basis of morphogenesis