Turino, L. N., M. D. Cristaldi, R. N. Mariano, S. Boimvaser, and D. E. Scandolo. “Metabolic Level Recognition of Progesterone in Dairy Holstein Cows Using Probabilistic Models”. Spanish Journal of Agricultural Research, Vol. 12, no. 2, May 2014, pp. 396-04, doi:10.5424/sjar/2014122-5271.