5Massardo, Pietro; Meazza, Giovanni; Bettarini, Franco; et al.Preparation of N-(halobenzoyl)-N'-[2-halo-4-[ 1,1,2-(trifluoro-2-methoxy)ethoxy] phenyl]ureas with insecticide activity. EP 306055,1989.
6Drabek, Jozef. Preparation of N-benzoy1-N'-(2,4-difluoro3,5-dihalophenyl) ureas as pesticide. EP309408,1989.
