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van Dorland, HA; Wettstein, HR; Leuenberger, H; Kreuzer, M (2007). Effect of supplementation of fresh and ensiled clovers to ryegrass on nitrogen loss and methane emission of dairy cows. Livestock science, 111(1-2), pp. 57-69. Amsterdam: Elsevier 10.1016/j.livsci.2006.11.015
