A. Roca-Fernandez, A. Gonzalez-Rodriguez, O. P. Vazquez-Yañez, and J. A. Fernandez-Casado, “Short communication. Effect of forage source (grazing vs. silage) on conjugated linoleic acid content in milk fat of Holstein-Friesian dairy cows from Galicia (NW Spain)”, Span. j. agric. res., vol. 10, no. 1, pp. 116-122, Jan. 2012.