Kharat, V.R., and J.D. Dhake. “Determination of Catopril in Non-Aqueous Media by Potentiometric and Enthalprimetric Techniques”. Asian Journal of Chemistry, vol. 12, no. 1, Mar. 2010, pp. 136-40, https://asianpubs.org/index.php/ajchem/article/view/22895.