ALI, Dalia Sami; AHMED, Buthainah A. The Perturbations of Weyl’s Theorems for Unbounded Class-A Operators . Journal of Kufa for Mathematics and Computer, [S. l.], v. 10, n. 1, p. 93–95, 2023. DOI: 10.31642/JoKMC/2018/100113. Disponível em: https://journal.uokufa.edu.iq/index.php/jkmc/article/view/11029. Acesso em: 18 may. 2024.