Abdel Majeed, Basma Abbas, et al. “Adsorption of Diclofenac Sodium and Ibuprofen by Bentonite Polyureaformaldehyde Thermodynamics and Kinetics Study”. Iraqi Journal of Chemical and Petroleum Engineering, vol. 19, no. 1, Mar. 2018, pp. 29-43, https://doi.org/10.31699/IJCPE.2018.1.4.