$L^p$ → $L^q$ Estimates for Stein’s Spherical Maximal Operators. Analysis in Theory and Applications, [S. l.], v. 42, n. 1, p. 90–108, 2026. DOI: 10.4208/ata.2025.deng90.04. Disponível em: https://www.global-sci.com/index.php/ata/article/view/23607. Acesso em: 26 feb. 2026.