GUMENCHUK, A.I.; KRASIKOVA, I.V.; POPOV, M.M. Points of narrowness and uniformly narrow operators. Carpathian Mathematical Publications, [S. l.], v. 9, n. 1, p. 37–47, 2017. DOI: 10.15330/cmp.9.1.37-47. Disponível em: https://scijournals.pnu.edu.ua/index.php/cmp/article/view/1445. Acesso em: 25 apr. 2024.