1. Abe, H., Fujii, T., Yamamoto, M., and Date, S., US Pat., 5,278,233, 11 Jan 1994, to Sumitomo Chem.
2. Abe, K., Sakano, H., Inoue, A., and Tajima, S., Jap Pat., 093,465, 05 Aug 1977, to Sumitomo Naugatuck.
3. Abolins, V., and Reinhardt, D. L., US Pat., 3,983,090, 28 Sep 1976; Canad. Pat., 994,040, 27 July 1976, to General Electric Co.
4. Abolins, V., Betts, J. E., and Holub, F. F., Europ. Pat. Appl., 129,825, 02 Jan 1985, to General Electric Co.
5. Abu-Isa, I. A., and Graham, P. M., US Pat., 5,194,468, 16 Mar 1993, to General Motors Corp.