PEKCAN ERTOKUS, GUZIDE, and A. HAKAN AKTAS. “Potentiometric Determination of PKa Values of Benzoic Acid and Substituted Benzoic Acid Compounds in Acetonitrile-Water Mixtures”. Asian Journal of Chemistry, vol. 21, no. 5, Mar. 2010, pp. 3825-3, https://asianpubs.org/index.php/ajchem/article/view/17360.