Onyejekwe, Ogugua. “Determination of Two-Time Dependent Coefficients in a Parabolic Partial Differential Equation by Homotopy Analysis Method”. International Journal of Applied Mathematical Research 3, no. 2 (April 15, 2014): 161–167. Accessed November 22, 2024. https://sciencepubco.com/index.php/ijamr/article/view/2219.