1. Van Krevelan, D. W., Properties of Polymers, p. 488, Elsevier Scientific Publishing Company (Amsterdam 1976).
2. Shida, M., L. V. Cancia, Polym. Engg. Sci.11, 124 (1971).
3. Smith, D. J., TAPPI60, 131 (1977).
4. Borzenski, F. J., Plastics Compounding25 (Sept./Oct. 1978).
5. Menges, G., J. Wortberg, W. Michaeli, Kunststoffe68, 47 (1973).