SULTAN, T. H. . Solving Harmonic Equation by Implicit Method. Journal of natural and applied sciences , [S. l.], v. 1, n. 10, p. 299–311, 2026. Disponível em: https://uraljournal.remahcenter.com/papers/index.php/ural/article/view/32. Acesso em: 30 jun. 2026.