Naser Majeed, Saba. “On Strongly E-Convex Sets and Strongly E-Convex Cone Sets”. Journal of Al-Qadisiyah for computer science and mathematics 11, no. 1 (January 24, 2019): Math Page 52 - 59. Accessed August 30, 2021. http://www.qu.edu.iq/journalcm/index.php/journalcm/article/view/459.