R. LÁSZTITY, B. LÁSZTITY, M. HIDVÉGI, and L. SIMON-SARKADI, “EFFECT OF FERTILIZERS ON THE YIELD, PROTEIN CONTENT AND AMINO ACID COMPOSITION OF WINTER CEREALS”, Period. Polytech. Chem. Eng., vol. 36, no. 1, pp. 25–41, Jan. 1992.