Milk production and efficiency of utilization of nitrogen, metabolizable protein, and amino acids are affected by protein and energy supplies in dairy cows fed alfalfa-based diets oleh J.-P. Laroche, R. Gervais, H. Lapierre, D.R. Ouellet, G.F. Tremblay, C. Halde, M.-S. Boucher, É. Charbonneau