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Dohme-Meier, F.; Kaufmann, L.D.; Görs, S.; Junghans, P.; Metges, C.C.; van Dorland, H.A.; Bruckmaier, Rupert; Münger, A. (2014). Comparison of energy expenditure, eating pattern and physical activity of grazing and zero-grazing dairy cows at different time points during lactation. Livestock science, 162, pp. 86-96. Elsevier 10.1016/j.livsci.2014.01.006