Asian Vegetables: Selected Fruit and Leafy Types - Chinese Broccoli and Choy Sum —Marita Cantwell, Xunli Nie, Ru Jing Zong, and Mas Yamaguchi
Comparison of Somatic and Sexual Interspecific Hybridization for the Development of New Brassica Vegetable Crops—Richard H. Ozminkowski, Jr. and Pablo S. Jourdan
Brussels Sprouts as an Alternative Crop for Southwest Virginia—Gregory E. Welbaum
Midwest Vegetable Production Guide for Commercial Growers 2000
Broccoli, Cabbage, Cauliflower, and Brussels Sprouts
Collards and Kale
Cole Crops production links
Brassica food crops In: Magness, J.R., G.M. Markle, C.C. Compton. 1971. Food and feed crops of the United States.