1. J. G. Williams, in ?Advances in Polymer Science? Vol. 27, edited by H. J. Cantow (Springer-Verlag, Berlin, New York, 1978) p. 67.
2. H. H. Kausch, ?Polymer Fracture? (Springer-Verlag, Berlin, New York, 1979) p. 252.
3. B. J. Briscoe, in ?Polymer Surfaces? edited by D. T. Clark and W. J. Feast (Wiley Interscience, New York, 1978) pp. 25?46.
4. H. Krupp, ?Advances in Colloid and Interface Science? Vol. 1, No. 2 (Elsevier, Amsterdam, New York, Oxford, 1976) p. 111.
5. K. Jud andH. H. Kausch,Polymer Bull. 1 (1979) 697.