GUO, Y.-D., T. NIEMELÄ, and U. TULISALO. “Maintenance of Male Sterile Germplasm in Brassica Rapa by in Vitro Propagation”. Agricultural and Food Science 9, no. 3 (January 3, 2000): 231–238. Accessed July 18, 2024. https://journal.fi/afs/article/view/5664.