Roca-FernándezA. I., FerrisC. P., and González-RodríguezA. “Short Communication. Behavioural Activities of Two Dairy Cow Genotypes (Holstein-Friesian Vs. Jersey X Holstein-Friesian) in Two Milk Production Systems (grazing Vs. Confinement)”. Spanish Journal of Agricultural Research, Vol. 11, no. 1, Feb. 2013, pp. 120-6, doi:10.5424/sjar/2013111-2682.