“Local Solvability of Semi Linear Initial Value Control Problem via Composite Semi Group Approach”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 25, no. 2 (October 24, 2021): 223–243. Accessed November 19, 2024. https://alhadhar.com/raf-journal/index.php/JAUCS/article/view/457.