HELFFER, B.; LAI, Pham The. Remarque sur la conjecture de Weyl. MATHEMATICA SCANDINAVICA, [S. l.], v. 48, p. 39–40, 1981. DOI: 10.7146/math.scand.a-11896. Disponível em: https://tidsskrift.dk/math/article/view/11896. Acesso em: 13 aug. 2026.