Chegini, A., N. Ghavi Hossein-Zadeh, and H. Hosseini-Moghadam. “Effect of Calf Sex on Some Productive, Reproductive and Health Traits in Holstein Cows”. Spanish Journal of Agricultural Research, Vol. 13, no. 2, May 2015, p. e0605, doi:10.5424/sjar/2015132-6320.