GRIGORYAN, M. G.; KROTOV, V. G. Quasiunconditional basis property of the Faber – Schauder system. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 2, p. 210–219, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1432. Acesso em: 5 dec. 2025.