Effect of production system on metabolic and endocrine responses of grass fed cows Kaufmann, L. D.; Muenger, A.; van Dorland, H. A.; Bruckmaier, R. M.; Dohme, F. Journal of Dairy Science 93: 157-157 2010 0022-0302 https://eurekamag.com/research/066/250/066250924.php