1. K. L. Paciorek, Fluoropolymers, High Polymers Vol. XXV, L. A. Wall, Ed., Wiley-Interscience, (1972)
2. R. G. Arnold, L. A. Barney and D. C. Thompson, Rubber Chem. & Technol.48 619 (1973).
3. Y. Kometani, (to Dai kin Kogyo Co., Ltd.), Published Japanese patent application (examined). No. 8863 (1977)
4. M. Tatemoto, paper presented at The First Regular Meeting of Soviet-Japanese Fluorine Chemists, Tokyo (1979)