SCHECHTER, M. On $L^p$ Estimates and Regularity II. MATHEMATICA SCANDINAVICA, [S. l.], v. 13, p. 47–69, 1963. DOI: 10.7146/math.scand.a-10688. Disponível em: https://www.mscand.dk/article/view/10688. Acesso em: 7 apr. 2025.