Shahid Ahmed, Yadav B, Vats P, Sharma R. Bell Wavelet operational matrix method for ­convection diffusion equation. Results in Nonlinear Analysis [Internet]. 2025 May 31 [cited 2025 Jul. 31];8(2):8-27. Available from: https://www.nonlinear-analysis.com/index.php/pub/article/view/544