Csörnyei, Zoltán, and János Kovács. “The Relationship Between Life Performance and Productivity in Breeding Sows”. Acta Agraria Kaposváriensis 3, no. 1 (February 15, 1999): 19–26. Accessed February 1, 2026. https://journal.uni-mate.hu/index.php/aak/article/view/1345.