VOLCHKOV, V. V.; VOLCHKOV, V. V.; SAVOST’YANOVA, I. M. One Problem Connected with the Helgason Support Problem. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 9, p. 1189–1200, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2058. Acesso em: 5 dec. 2025.