Klopčič, Marija, J. Pogačar, and Oto Hanuš. “Comparison of Urea Content in Milk, Measured in Different Laboratories”. Acta Agraria Kaposváriensis 3, no. 2 (February 15, 1999): 71–77. Accessed April 17, 2025. https://journal.uni-mate.hu/index.php/aak/article/view/1350.