Cvetković, L. J., and D. Herceg. “Improvement of the Area of Convergence of the AOR Method”. Anal. Numér. Théor. Approx. 16, no. 2 (August 1, 1987): 109–115. Accessed April 15, 2025. https://ictp.acad.ro/jnaat/journal/article/view/1987-vol16-no2-art3.