MOHAMMED HUSSAIN, Aqeel. On Essentially Normality of the Composition Operator C_σ. Journal of Al-Qadisiyah for Computer Science and Mathematics, [S. l.], v. 6, n. 2, p. 149–156, 2017. Disponível em: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/114. Acesso em: 15 nov. 2024.