ISMAILOV, V. E. On the uniqueness of representation by linear superpositions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 12, p. 1620–1628, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1948. Acesso em: 5 dec. 2025.