1. Marsh, D.G. (1994) in Samter's Immunologic Diseases (Frank, M.M., Austen, K.F., Claman, H.N. and Unanue, E.R., eds), pp. 1257–1272, Little, Brown and Co
2. One gene—four syndromes
3. Cutting, G.R. (1997) in Emery and Rimoin's Principals and Practice of Medical Genetics (Rimoin, D.L., Connor, J.M. and Pyeritz, R.D., eds), pp. 2685–2717, Churchill Livingstone
4. Kauffman, S.A. (1993) The Origins of Order, Oxford University Press
5. Depew, D.J. and Weber, B.H. (1995) Darwinism Evolving, MIT Press