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2. Shertzer, C. R., and Metzner, A. B., Trans. Pl. Inst., Lond., 31, 148 (1963); ibid., 32, 217 (1964).
3. Shertzer, C. R., and Metzner, A. B., Proc. Fourth Intern. Cong. on Rheology, Providence (1963).
4. Harris, J., Nature, 190, 993 (1961).
5. Oliver, D. R., Canad. J. Chem. Eng., 44, 100 (1966).