Osotsi, Joab Malanda, Péter Balogh, and Gabriella Novotni Dankó. “Heat-No-Service: Reproductive Lifetime Performance of Gilts Inseminated on First Versus Second Observed Estrus in Commercial Piglet Producing Herds”. Acta Agraria Debreceniensis, no. 1 (May 20, 2020): 77–80. Accessed April 11, 2021. https://ojs.lib.unideb.hu/actaagrar/article/view/3731.