VILKAUSKAS, L. Zones of normal convergence in the multi-dimensional case. Lithuanian Mathematical Journal, [S. l.], v. 1, n. 1-2, p. 27–42, 1961. DOI: 10.15388/LMJ.1961.19148. Disponível em: https://www.journals.vu.lt/LMJ/article/view/19148.. Acesso em: 6 may. 2024.