Santiago, C. and Hoffmann, W.C. 2014. The protein supplementation during the winter and the reproductive capacity of beef cattle in Rio Grande do Sul. Pesquisa Agropecuaria Brasileira. 9, 3 (Apr. 2014), 13–16. DOI:https://doi.org/10.1590/S1678-3921.pab1974.v9.17160.