Silva, Alessandro Guerra da, et al. “Interrow Intercropping of Sorghum With Brachiaria in off-Season Cultivation to Production Grains and Forage”. Semina: Ciências Agrárias, vol. 34, no. 6Supl1, Dec. 2013, pp. 3475-88, doi:10.5433/1679-0359.2013v34n6Supl1p3475.