1. Adam, G. and Delbruck, M. (1968), In: Structural Chemistry and Molecular Biology, (Rich, A. and Davidson, N., eds.), W.H. Freeman and Co., San Francisco, pp. 198–215.
2. Bell, G.I. (1974), Nature, 248, 430–431.
3. Bell, G.I. and DeLisi, C.P. (1974), Cellular Immunol., 10, 415–431.
4. Berg, H.C. and Purcell, E.M. (1977), Biophys. J., 20, 193–219.
5. Braun, V. and Hantke, K. (1977), In: Microbial Interactions, Receptors and Recognition, Series B, Vol. 3, (Reissig, R.L. ed.), Chapman and Hall, London, pp. 101–137.