HERAIZ , R. Variable Herz estimates for fractional integral operators. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 8, p. 1034–1046, 2020. DOI: 10.37863/umzh.v72i8.6024. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6024. Acesso em: 9 dec. 2025.