1. Surveys of pest incidence on oilseed rape in the U.K.;Alford,1975
2. The biology and control of the colza seed-pod weevil (Ceutorhynchus assimilis Payk.) and the brassica pod midge (Dasineura brassicae Winn.);Ankersmit;Instit. Plant. Onderzaek Wageningen, Med.,1956