1. Kishino , S.
Shimomatsu , A. and
Shinokawa , K. 1976. Japan Patent, 7620506(.C. A. 86, 16418 (1977).
2. Sumitomo Chemical Co., Ltd. 1985. Japan Patent, 8561586(.C. A. 103, 123707 (1985).
3. Bayer , H. and
Hurt , W. S. 1977. German Patent, 2635931(.C. A. 87, 52755 (1977).