AHMAD, J.; HAMID, Z. Analytical approximate solution of higher order boundary value problems via variational iteration method. BIBECHANA, [S. l.], v. 15, p. 37–42, 2017. DOI: 10.3126/bibechana.v15i0.18347. Disponível em: https://nepjol.info/index.php/BIBECHANA/article/view/18347. Acesso em: 21 dec. 2024.