1. Nomenclature of oleiferous Brassicas cultivated in Punjab;Alam Z.;Indian J. agric. Sci.,1945
2. Anonymus 1986 Germplasm catalogue –Brassicaspecies. Genetic resources and seed unit AVRDC. Tainan (Taiwan) 1–21.
3. A check-list of the Korean cultivated plants
4. Some recent Chinese vegetables;Bailey L. H.;Cornell Univ. agric. exp. Stat., Hort. Div., Bull.,1894
5. The cultivated Brassicas;Bailey L. H.;Genet. Herb.,1922