Syrjälä, Liisa. “Effect of Large Doses of Zinc Bacitracin on Voluntary Intake, Mastication and Digestibility of Hay in Adult Ruminants”. Agricultural and Food Science 43, no. 2 (May 1, 1971): 86–93. Accessed July 24, 2024. https://journal.fi/afs/article/view/71787.