Huhtanen, Pekka, Hannele Khalili, and Matti Näsi. 1991. “A Comparison of Untreated and Formaldehyde-Treated Barley distiller’s Solubles and Rapeseed Meal As Protein Supplements in Dairy Cows Given Grass Silage Ad Libitum”. Agricultural and Food Science 63 (5):455-63. https://doi.org/10.23986/afsci.72410.