1. F. Schultz-Grunow and H. Weymann, Kolloid-Z.,131, 61?66 (1953).
2. F. Schultz-Grunow, VDI Zeitschrift, 97, No. 14, 409?416 (1955).
3. R. V. Torner, Inzh.-Fiz. Zh,3, No. 6, 23?28 (1960).
4. G. V. Vinogradov andN. V. Prozorovskaya, Plasticheskie Massy, No. 5 (1964).
5. J. M. McKelvey, Plastics Processing, John Wiley and Sons, New York, (1962).