M. Montaño Gómez, J. Salinas Chavira, J. Calderón Cortés, O. Manríquez Núñez, V. González Vizcarra, and O. Ruiz Barrera, “Effect of magnesium oxide (Mgo) addition in diets for lactating holstein cows”, Rev. Cient. FCV-LUZ, vol. 20, no. 3, 1.