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1 Ipharraguerre IR, "Varying protein and starch in the diet of dairy cows. I. Effects on ruminal fermentation and intestinal supply of nutrients" 88 : 2537-2555, 2005
2 Clark JH, "Urea utilization by lactating cows" 56 : 763-774, 1973
3 Metcalf JA, "The efficiency of conversion of metabolisable protein into milk true protein over a range of metabolisable protein intakes" 2 : 1193-1202, 2008
4 Shalloo L, "The economic impact of cow genetic potential for milk production and concentrate supplementation level on the profitability of pasture based systems under different EU milk quota scenarios" 142 : 357-369, 2004
5 St-Pierre NR, "The cost of nutrients, comparison of feedstuffs prices and the current dairy situation" 14 : 2012
6 Fox DG, "The Cornell Net Carbohydrate and Protein System model for evaluating herd nutrition and nutrient excretion" 112 : 29-78, 2004
7 Van Soest PJ, "Symposium on factors influencing the voluntary intake of herbage by ruminants: voluntary intake in relation to chemical composition and digestibility" 24 : 834-843, 1965
8 SAS Institute, "SAS System for Windows. Release 8.1 (TS1 MO)" SAS Institute Inc 2000
9 Brun-Lafleur L, "Predicting energy× protein interaction on milk yield and milk composition in dairy cows" 93 : 4128-4143, 2010
10 Brito AF, "Performance and nitrogen use efficiency in mid-lactation dairy cows fed timothy cut in the afternoon or morning" 99 : 5445-5460, 2016
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