Hassan Mohammed, Ali, et al. “Evaluation of Double Integrals With Continuous Integrands by Using Acceleration Methods Aitken‘ S With Rule”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 6, no. 2, Aug. 2017, pp. 1-9, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/119.