Jaakkola, Seija, Eeva Saarisalo, and Terttu Heikkilä. 2009. “Formic Acid Treated Whole Crop Barley and Wheat Silages in Dairy Cow Diets: Effects of Crop Maturity, Proportion in the Diet, and Level and Type of Concentrate Supplementation”. Agricultural and Food Science 18 (3-4):234-56. https://doi.org/10.2137/145960609790059569.