T. Vassilina, A. Umbetov, L. J. Cihacek, and G. Vassilina, “Some Aspects of Mineral and Organic Nutrition for Improved Yield and Oil Contents of Mustard (Brassica Juncea)”, Eurasian Chem.-Technol. J., vol. 14, no. 3, pp. 263–269, Sep. 2012.