M. Al-Hasany, A., H. A. Al-Wahb, and A. Th. Al-Taee. “Electrochemical Study of Theophylline - Urea Interaction Using Square Wave Voltammetry”. Rafidain Journal of Science, vol. 28, no. 2, June 2019, pp. 120-6, doi:10.33899/rjs.2019.159970.