N. Castro, O. Wellnitz, M.T. Sprengler, Vanessa Lollivier, R.M. Bruckmaier. Circadian profiles of melatonin, prolactin and cortisol during days with long and short photoperiod in dairy cows.
7th International Conference on Farm Animal Endocrinology, Aug 2011, Bern (CH), Switzerland.
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