Fodor, István, and László Ózsvári. “Early Pregnancy Diagnosis on Large Dairy Farms and Its Role in Improving Profitability: Literature Review”. Animal welfare, Ethology and Housing Systems (AWETH) 14, no. 1 (November 29, 2018): 22–36. Accessed December 5, 2025. https://journal.uni-mate.hu/index.php/aweth/article/view/6491.