The addition of narasin into a mineral mixture improves performance of grazing Nellore steers. - Polizel, D. M; Barbosa, M. J. P. T; Cappellozza, B. I; Lopes, C. N; Ferraz Junior, M. V. C; Gobato, L. G. M; Gonçalves, J. R. S; Pires, Alexandre Vaz (Journal of Animal Science, 2017)