RAVELONIRINA, H.S.G.; RANDRIAMBOLOLONDRANTOMALALA, P.; ANONA, M. Sur les algèbres de lie d’un système de champs de vecteurs permutables. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 29, p. 163–174, 2012. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6047. Acesso em: 18 jul. 2026.