E.B. da Silva, F.; R.R. Almeida, W.; R. Paula, F.; L.H. Müller, A.; M.M. Flores, Érico; F Ferrão, M. The Effect of PH on the Simultaneous Determination of Sulfamethoxazole and Trimethoprim by Ultraviolet Spectrophotometry and Multivariate Calibration. Drug Anal. Res. 2017, 1, p. 15-23.