Mellado, M., E. Sepúlveda, C. Mesa-Herrera, F. G. Veliz, J. R. Arevalo, J. Mellado, and A. De Santiago. “Effects of Heat Stress on Reproductive Efficiency of High Yielding Holstein Cows in a Hot-Arid Environment”. Revista Colombiana De Ciencias Pecuarias, vol. 26, no. 3, Sept. 2013, pp. 193-00, doi:10.17533/udea.rccp.324829.