CHEN, John T.; Seneta E. М. Multivariate Sobel–Uppuluri–Galambos-Type Bounds. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 9, p. 1283–1293, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4535. Acesso em: 11 apr. 2025.