VYNNYTS’KYI, B.; KHATS’, R.; SHEPAROVYCH, I. Unconditional Bases of Systems of Bessel Functions. Eurasian Mathematical Journal, [S. l.], v. 11, n. 4, 2024. Disponível em: https://emj.enu.kz/index.php/main/article/view/198. Acesso em: 5 oct. 2024.