M., S. D.; EIDI, J. H. On (P*-N) quasi normal operators Of order "n" In Hilbert space. Al-Mustansiriyah Journal of Science, [S. l.], v. 32, n. 1, p. 10–13, 2021. DOI: 10.23851/mjs.v32i1.920. Disponível em: https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/920. Acesso em: 5 oct. 2022.