Valero, M., García Villanova, R. y Thomas, J. (1965) «Comparative study of nicotine titrations by the colorimetric method of the complex formed with naphthylamine and BrCN, and by the spectrophotometric method in the ultraviolet», Ars Pharmaceutica (Internet), 6(3-4), pp. 95–111. Disponible en: https://revistaseug.ugr.es/index.php/ars/article/view/7570 (Accedido: 22 julio 2024).