Wozniak, Gracjan, et al. “PREGNANCY RATE AFTER APPLICATION OF OVSYNCH ACCORDING TO THE RELIABILITY OF THE PROGRAM AND THE NUMBER OF COWS TREATED AT THE SAME TIME”. Translational Research in Veterinary Science, vol. 4, no. 1-2, July 2021, pp. 28-32, doi:10.12775/TRVS.2021.004.