Moreira, Adônis, et al. “Magnesium Influence on Manganese and Zinc Uptake by Excised Roots of Soybean”. Pesquisa Agropecuaria Brasileira, vol. 38, no. 1, Jan. 2003, pp. 95-101, doi:10.1590/S1678-3921.pab2003.v38.6549.