Rampim, L.; Lana, M. do C.; Frandoloso, J. F. Available Phosphorus and Sulphur, Exchangeable Aluminum and Remaining Phosphorus in Rhodic Eutrudox Submitted to Gypsum Cultivated With Wheat and Soybean. Semina: Ciênc. Agrár. 2013, 34, 1623-1638.