1. R. H. Kline and J. P. Miller, Rubber Chem. Technol., 46 (1973) 96.
2. D. Munteanu, I. Tincul and T. Chirila, Mater. Plast. (Bucharest), 18 (1981) 147.
3. G. Scott, Developments in Polymer Stabilization-4, Ed. G. Scott, Applied Science Publishers, London 1981, p. 202.
4. J. A. Kuczkowski and J. G. Gillick, Rubber Chem. Technol., 57 (1984) 621.
5. D. Munteanu and I. Tincul, Mater. Plast. (Bucharest), 21 (1984) 79.