参考文献

American Cyanamid Company Patent: US3932479 A1, 1976 ; Title/Abstract Full Text Show Details American Cyanamid Company Patent: US3966773 A1, 1976 ; Title/Abstract Full Text Show Details American Cyanamid Company Patent: US4110368 A1, 1978 ; Title/Abstract Full Text Show Details American Cyanamid Company Patent: US4123456 A1, 1978 ;