Invertible Operators on Soft Normed Spaces. Iraqi Journal of Science, [S. l.], v. 61, n. 5, p. 1089–1097, 2020. DOI: 10.24996/ijs.2020.61.5.17. Disponível em: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/1376.. Acesso em: 6 aug. 2025.