Effects of supplying leucine and methionine to early-lactating cows fed silage-concentrate based diets with a calculated deficiency in leucine and methionine Thomas F. Kröber, Franz Sutter, Markus Senn, Wolfgang Langhans and Michael KreuzerAnim. Res., 50 1 (2001) 5-20DOI: https://doi.org/10.1051/animres:2001102