Bressan, W., Siqueira, J. O., Vasconcellos, C. A., & Purcino, A. A. C. (2001). Mycorhizal fungi and phosphorus on growth, yield and nutrition of intercropped grain sorghum and soybean. Pesquisa Agropecuaria Brasileira, 36(2), 315–323. https://doi.org/10.1590/S1678-3921.pab2001.v36.6122