HÖRMANDER, L. A remark on singular supports of convolutions. MATHEMATICA SCANDINAVICA, [S. l.], v. 45, p. 50–54, 1979. DOI: 10.7146/math.scand.a-11824. Disponível em: https://www.mscand.dk/article/view/11824. Acesso em: 29 apr. 2024.