Lamminen, M, Børsting, C F, Hellwing, A L F, Johansen, M, Weisbjerg, M R & Lund, P 2019, ' Effect of grass and maize silage ratio on milk and methane production of lactating dairy cows ', 70th Annual Meeting of the European Federation of Animal Science (EAAP), Ghent, Belgium, 26/08/2019-30/08/2019 pp. 639 . Aarhus University