El Seidy, Essam, Salah Eldin Hussein, and Atef Mohamed. “Properties of the Characteristic Polynomials and Spectrum of Pn and Cn”. International Journal of Applied Mathematical Research 5, no. 2 (May 22, 2016): 132–137. Accessed May 5, 2024. https://sciencepubco.com/index.php/ijamr/article/view/6106.