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Rovai, M; Kollmann, M T; Bruckmaier, R M (2007). Incontinentia lactis: physiology and anatomy conducive to milk leakage in dairy cows. Journal of dairy science, 90(2), pp. 682-90. Savoy, Ill.: American Dairy Science Association
Kollmann, M T; Locher, M; Hirche, F; Eder, K; Meyer, H H D; Bruckmaier, R M (2006). Effects of tryptophan supplementation on plasma tryptophan and related hormone levels in heifers and dairy cows. Domestic animal endocrinology, 34(1), pp. 14-24. New York, N.Y.: Elsevier 10.1016/j.domaniend.2006.09.005
