BABENKO, K. On the mean convergence of multiple Fourier series and the asymptotics of the Dirichlet kernel of spherical means . Eurasian Mathematical Journal, [S. l.], v. 9, n. 4, p. 22–60, 2018. DOI: 10.32523/2077-9879-2018-9-4-22-60. Disponível em: https://emj.enu.kz/index.php/main/article/view/128. Acesso em: 15 nov. 2026.