Chacha, Chacha Stephen. “Inversion–free Iterative Method for Finding Symmetric Solution of the Nonlinear Matrix Equation X-A^* X^q A=I (q≥2)”. Tanzania Journal of Science 47, no. 4 (October 28, 2021): 1392–1401. Accessed July 19, 2025. https://tjs.udsm.ac.tz/index.php/tjs/article/view/844.