Jaakkola, S., Saarisalo, E., & Heikkilä, T. (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), 234–256. https://doi.org/10.2137/145960609790059569