N. Abdul-Jabbar, “Properties of the Characteristic Polynomials of Pn and Cn”, Al-Nahrain J. Sci., vol. 14, no. 4, pp. 171–176, Dec. 2011, Accessed: May 22, 2026. [Online]. Available: https://mail.anjs.edu.iq/index.php/anjs/article/view/783