ATHMAR RAZAAQ SAEID; LAMEES K. ALZAKI. Fractional differential equations with an approximate solution using the natural variation iteration method. Results in Nonlinear Analysis, [S. l.], v. 6, n. 3, p. 107–120, 2023. Disponível em: https://nonlinear-analysis.com/index.php/pub/article/view/316. Acesso em: 4 dec. 2024.