[1]
A. Balláné Kovács, S. Kincses, and P. T. . Nagy, “Evaluation of KCl-EDTA-, CaCl2- DTPA-, CaCl2-DTPA-TEA extractants for estimating available Cu in soils”, Acta agrar. Debr., no. 27, pp. 5–9, Nov. 2007.