RASHID, M. H. M. . Spectrum of k-quasi-class A_n operators. New Zealand Journal of Mathematics, [S. l.], v. 50, p. 61–70, 2020. DOI: 10.53733/64. Disponível em: https://nzjmath.org/index.php/NZJMATH/article/view/64. Acesso em: 27 nov. 2024.