Ashour, Arwa, Mohammed Mahmoud AL-Ashker, and Al-Hussain Abu Oda. “On ϕ - Classes of Submodules”. Journal of Progressive Research in Mathematics 11, no. 1 (January 16, 2017): 1510-1522. Accessed May 6, 2024. http://scitecresearch.com/journals/index.php/jprm/article/view/934.