O. Balocchi, D. Pinochet, F. Wittwer, P. Contreras, R. Echeverria, e F. Guzmán, “Yield and forage mineral composition of a permanent pasture fertilized with magnesium”, Pesq. Agrop. Bras., vol. 36, nº 10, p. 1309–1317, out. 2001.