Evaluation of 15N and purine bases as microbial markers to estimate ruminal bacterial nitrogen outflow in dairy cows - Del Valle, Tiago Antonio; Ghizzi, Lucas Ghedin; Zilio, Elissandra Maiara de Castro; Marques, J. A; Dias, M. S. S; Silva, T. B. P; Gheller, Larissa Schneider; Silva, G. G; Sconamiglio, N. T; Nunes, A. T; Rennó, Luciana Navajas; Costa, V. E; et al. (Animal Feed Science and Technology, 2019)