ELjaneid, Dr. Nedal. Hassan E. “EXISTENCE AND UNIQUENESS OF SOLUTION OF SOME BOUNDARY VALUE PROBLEMS FOR DELAY DIFFERENTIAL EQUATIONS”. Journal of Advance Research in Mathematics And Statistics (ISSN 2208-2409) 4, no. 7 (July 31, 2017): 01–06. Accessed June 14, 2025. https://jarm-s.com/index.php/MS/article/view/16.