SILVANOVICH, Olga V.; SHIROKOV, Nikolai A. Approximation by entire functions on a countable union of segments on the real axis. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, [S. l.], v. 3, n. 4, p. 644–650, 2020. Disponível em: https://math-mech-astr-journal.spbu.ru/article/view/8670. Acesso em: 19 may. 2024.