Syrjälä, Liisa, and Esko Poutiainen. “Untreated and Formaldehyde Treated Protein Concentrate Mixture in the Feeds of Bulls”. Agricultural and Food Science 51, no. 1 (January 1, 1979): 59–67. Accessed November 23, 2024. https://journal.fi/afs/article/view/72019.