P. T. Nagy, S. Thurzó, I. Kincses, Z. Szabó, and J. Nyéki, “Effect of foliar fertilization on leaf mineral composition, sugar and organic acid contents of sweet cherry”, Int. j. hortic. sci., vol. 14, no. 1-2, pp. 45–48., Feb. 2008, doi: 10.31421/IJHS/14/1-2./781.