P. T. Nagy, S. Thurzó, G. Drén, Z. Szabó, M. Soltész, and J. Nyéki, “Comparative study of effects of a complex fertilizer and a biostimulator on macroelement content of leaf and fruit quality on sweet cherry (Prunus avium)”, Int. j. hortic. sci., vol. 13, no. 3, pp. 91–94., Sep. 2007, doi: 10.31421/IJHS/13/3/753.