GRAFAKOS, L.; LIU, L.; YANG, D. vector-valued singular integrals and maximal functions on spaces of homogeneous type. MATHEMATICA SCANDINAVICA, [S. l.], v. 104, n. 2, p. 296–310, 2009. DOI: 10.7146/math.scand.a-15099. Disponível em: https://www.mscand.dk/article/view/15099. Acesso em: 1 may. 2024.