Silvanovich, Olga V., and Nikolai A. Shirokov. “Approximation by Entire Functions on a Countable Union of Segments on the Real Axis. 4. Inverse Theorem”. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy 5, no. 3 (August 19, 2020): 441–451. Accessed May 18, 2024. https://math-mech-astr-journal.spbu.ru/article/view/8504.