TITUS, H. M.; JAYACHANDRAN, S. A. Stability investigations on greenhill shafts using variational iteration method. Journal of Structural Engineering, [S. l.], v. 51, n. 1-2, p. 67–79, 2024. Disponível em: http://jose.serc.res.in/index.php/JOSE/article/view/1175. Acesso em: 4 apr. 2025.