ALOBAIDI, G.; HASLAM, M. C.; MALLIER, R. Vortices on a sphere. Mathematical Modelling and Analysis, [S. l.], v. 11, n. 4, p. 357–364, 2006. DOI: 10.3846/13926292.2006.9637323. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/9645. Acesso em: 17 may. 2025.