Sousa, A. S. F. de, Oliveira, I. C. T. S., Jesus, C. S. de, & Peres, L. S. (2015). Potentiometric determination of free acid in phosphoric acid liquor. Instituto De Engenharia Nuclear: Progress Report, (1), 91. Recuperado de https://revistas.ien.gov.br/index.php/ienprogressreport/article/view/48