VYNNYTS’KYI, B. V.; SHAPOVALOVSKII, A. V. A Remark on the Completeness of Systems of Exponentials with Weight in $L^2(ℝ)$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 7, p. 875–880, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4486. Acesso em: 14 apr. 2025.