JANSON, S. Characterisations of $H^1$ by singular intetgral transforms on martingales and $\mathsf{R}^n$. MATHEMATICA SCANDINAVICA, [S. l.], v. 41, p. 140–152, 1977. DOI: 10.7146/math.scand.a-11708. Disponível em: https://www.mscand.dk/article/view/11708. Acesso em: 27 apr. 2024.