Influence of different fat supplements on digestibility and ruminal digestion in cows M. Doreau, Y. Chilliard, D. Bauchart, B. Michalet-Doreau, J. Fléchet, R. Lefaivre, C. Legay, M. Meyer and A. Ollier Ann. Zootech., 40 1 (1991) 19-30 DOI: 10.1051/animres:19910103