1. Spott, G., Dissertation T. H. (München 1964).
2. Rabinowitsch, B., Z. physik. Chem. (Leipzig) A,1, 145 (1929).
3. Appeldoorn, K. J., Abstr. of Papers, 148th Meeting A.C.S. Division Polymer Chem. Aug.,/Sept. 64.
4. Schurz, J. undM. Herman, Rheol. Acta2, 143 (1962).
5. Gee, R. E. undJ. B. Lyon, Ind. Eng. Chem.49, 956 (1957).