J. T. Campos, F. Morotti, L. Z. Bergamo, C. B. Costa, and M. M. Seneda, “Pregnancy rate evaluation in lactating and non-lactating Nelore cows subjected to fixed-time artificial insemination using injectable progesterone”, Semina: Ciênc. Agrár., vol. 37, no. 4, pp. 1991–1996, Aug. 2016.