Silva, Ady Raul da, and José Maria Vilela de Andrade. “Influence of Micronutrients on the Male Sterility, on Upland Wheat and on Rice and Soybean Yields, in Red-Yellow Latosol”. Pesquisa Agropecuaria Brasileira, vol. 18, no. 6, Apr. 2014, pp. 593-01, doi:10.1590/S1678-3921.pab1983.v18.15309.