Jassam, Ahmed A., and R. B. Esmaeel. “CONVERGENCES VIA ẛـ PREÙ€ gÙ€ OPEN SET”. Ibn AL-Haitham Journal For Pure and Applied Sciences 33, no. 1 (January 20, 2020): 152–159. Accessed July 27, 2024. https://jih.uobaghdad.edu.iq/index.php/j/article/view/2381.