NUDEL'MAN, A. A. On M. G. Krein’s contribution to the moment problem. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 1-2, p. 63–75, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5770. Acesso em: 5 dec. 2025.