1. Pauling, L. (1960) The Nature of the Chemical Bond, Cornell University Press, New York.
2. Good, R. J. (1967) in Treatise on Adhesion and Adhesives, Vol. 1 (ed. R. L. Patrick), Marcel Dekker, New York, p. 15.
3. Young, T. (1805) Trans. Roy. Soc 95, 65.
4. Good, R. J. (1973) in Aspects of Adhesion - 7 (eds D. J. Alper and K. W. Allen), Transcripta Books, London, p. 182.
5. Bangham, D. H. and Razouk, R. I. (1937) Trans. Faraday Soc. 33, 1459.