M.A. Fraihat, Safwan, and Abdalla M.S. Abulkibash. “Differential Electrolytic Potentiometry: A Detector for Flow Injection Sequential Analysis in Complexation Reactions”. Asian Journal of Chemistry, vol. 24, no. 11, June 2012, pp. 4847-50, https://asianpubs.org/index.php/ajchem/article/view/9778.