Al-Hindawe, Ahmed L.M. “On B-Syndetic Sets Ahmed L.M. Al-Hindawe”. Journal of Kufa for Mathematics and Computer 1, no. 4 (November 30, 2011): 1–4. Accessed May 18, 2024. https://journal.uokufa.edu.iq/index.php/jkmc/article/view/2228.