Bezerra, Régis Pinheiro Martins, et al. “Phosphorus Fractions and Correlation With Soil Attributes under No-Tillage and Crop-Livestock Integration Systems in Cerrado of Goias”. Semina: Ciências Agrárias, vol. 36, no. 3, June 2015, pp. 1287-06, doi:10.5433/1679-0359.2015v36n3p1287.