K.SHCHIGOLEV, V. Applying He’s variational iteration method to FRW cosmology. International Journal of Advanced Astronomy, [S. l.], v. 7, n. 2, p. 39–48, 2019. DOI: 10.14419/ijaa.v7i2.29428. Disponível em: https://sciencepubco.com/index.php/IJAA/article/view/29428.. Acesso em: 5 may. 2024.