KÁLLAY, T.; SZŰCS, E. Experimental approach in apple tree nutrition. International Journal of Horticultural Science, [S. l.], v. 9, n. 2, p. 9–13., 2003. DOI: 10.31421/IJHS/9/2/383. Disponível em: https://ojs.lib.unideb.hu/IJHS/article/view/383. Acesso em: 9 feb. 2023.