J. de Sousa, J. Conrad, G. Mott, L. Mcdowell, C. Ammerman, and W. Blue, “Interrelationships among mineral levels in soil, forage and animal tissues on ranches in northern Mato Grosso 4 Zinc, magnesium, sodium and potassium”, PAB, vol. 17, no. 1, pp. 11–20, Apr. 2014.