Gonçalves, G. K.; Bortolon, L.; Meurer, E. J.; Gonçalves, D. R. N.; Sousa, R. O. de; Fagundes, S. M. Phosphorus Extractors for Irrigated Rice on Soils under Reactive Phosphate Fertilization. Rev. Ciênc. Agrovet. 2012, 11, 196-204.