1. Private communication from G. G. A. Bohm.
2. For a review see M. Dole, J. Macromol. Sci. Chem. 1981, A 15 (7), 1403;
3. ‘History of Polymer Science and Technology,’ R. B. Seymour, Ed. Marcel Dekker, N.Y. 1983, p. 339
4. G. Oster, J. Polym. Sci. Letters Ed., 1956, 22, 185
5. G. Oster, G. K. Oster, H. Moroson, J. Polym. Sci. 1959, 34, 671