ANNÉ, Colette; CHARBONNEL, Anne-Marie. Bohr-Sommerfeld conditions for several commuting Hamiltonians. CUBO, A Mathematical Journal, [S. l.], v. 6, n. 2, p. 15–34, 2004. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1638. Acesso em: 12 oct. 2025.