1.
E. Songolo M. A Positivity-Preserving Nonstandard Finite Difference Scheme for Parabolic System with Cross-Diffusion Equations and Nonlocal Initial Conditions. ASRJETS-Journal. 2016;18(1):252-258. Accessed September 12, 2025. https://asrjetsjournal.org/American_Scientific_Journal/article/view/1611