[1]
M. Valero, R. García Villanova, y J. Thomas, «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 Pharm, vol. 6, n.º 3-4, pp. 95–111, feb. 1965.