F. QASEM, A. Numerical Solution for Linear Parabolic Reaction-Double Diffusivity System using the Operational Matrices of the Haar Wavelets Method. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 5, n. 1, p. 177–195, 2008. DOI: 10.33899/csmj.2008.163958 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/37101. Acesso em: 17 dec. 2025.