1. Magill, J. H., and Ubbelohde, A. R., Trans. Faraday Soc., 54, 1811 (1958).
2. Plazek, D. J., and Magill, J. H., paper presented at Ann. Meeting Soc. Rheology, held at Mellon Institute, Pittsburgh, Pennsylvania, 15213 (abstr., Rheology Bull., 33, No. 4, 6, 1964).
3. Hollomon, J. H., and Turnbull, D., Prog. Metal Phys., 4, 333 (1953).
4. Hoffmann, J. D., S. P. E. Trans., 4, 315 (1964).
5. Vogel, H., Physik Z., 22, 645 (1921).