SUÑÉ, J. M.; IBÁÑEZ, S. Determination of pH: I. General techniques. Ars Pharmaceutica (Internet), [S. l.], v. 8, n. 11-12, p. 477–487, 1967. Disponível em: https://revistaseug.ugr.es/index.php/ars/article/view/7688. Acesso em: 17 may. 2024.