“Arbuscular mycorrhizal fungi within agroforestry and traditional land use systems in semi-arid Northeast Brazil - doi: 10.4025/actasciagron.v35i3.16213” (2013) Acta Scientiarum. Agronomy, 35(3), p. 307–314. doi:10.4025/actasciagron.v35i3.16213.