Setälä, Jouko, and Liisa Syrjälä-Qvist. “Effect of Formaldehyde-Treated Urea on Rumen Fermentation, Ration Digestibility and Nitrogen Utilization”. Agricultural and Food Science 54, no. 1 (January 1, 1982): 32–42. Accessed April 20, 2024. https://journal.fi/afs/article/view/72087.