1. A new approach to the quantitative estimation on nitrogen metabolic pathways in the rumen;Aharoni;Br. J. Nutr.,1991
2. Supplementing barley or rapeseed meal to dairy cows fed grass red-clover silage: I. Rumen degradability and microbial flow;Ahvenjärvi;J. Anim. Sci.,2002
3. Determination of reticulo-rumen and whole-stomach digestion in lactating cows by omasal canal or duodenal sampling;Ahvenjärvi;Br. J. Nutr.,2000
4. Nitrogen metabolism of ruminal micro-organisms;Allison,1970
5. Official Methods of Analysis,1980