1. Vinogradov, G. V., Polymer, 18, 1275 (1977).
2. For example: J. Non-Newton. Fluid Mechan.,4, 1 and 2, Special Issue on Stretching-Flow, 1978.
3. Hill, J. W. and J. A. Cucollo, J. Macromolec. Sci., C14, 107 (1976)
4. Malkin, A. Ya. and V. G. Kulichikhin, Khim. Volokna, 2, 4 (1975)
5. C. J. Petrie, Elongational Flows,. Pitman, 1979.