Hussein Mabeed, Zena. “Strong Convergence Theorems of Ishikawa Iteration Process With Errors in Banach Space”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 3, no. 2, Oct. 2017, pp. 174-82, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/287.