“Homotopy perturbation method with modified Riemann –Liouville derivative for solving fractional- time partial differential equations ” (2012) University of Thi-Qar Journal of Science, 3(2), pp. 163–173. Available at: https://jsci.utq.edu.iq/index.php/main/article/view/395 (Accessed: 3 May 2024).