Vassilina, T., Umbetov, A., Cihacek, L. J., & Vassilina, G. (2012). Effects of Mineral Nutrition on Seed Yield and Quality of Mustard (Brassica Juncea). Eurasian Chemico-Technological Journal, 14(3), 253–261. https://doi.org/10.18321/ectj122