Machado, Luís Armando Zago. “Mixtures of Annual and Perennial Forage for Soybean Sucession in crop‑livestock Integration Systems”. Pesquisa Agropecuaria Brasileira, vol. 47, no. 4, May 2012, pp. 629-36, doi:10.1590/S1678-3921.pab2012.v47.11747.