1. Allen, I. E., & Seaman, J. (2016). Online report card: Tracking online education in the United States. Oakland, CA: Bay View Analytics. https://www.bayviewanalytics.com/index.html
2. Students’ perceptions of online learning and instructional tools: A qualitative study of undergraduate students use of online tools;Armstrong D. A.;The Turkish Online Journal of Educational Technology,,2011
3. Online Learning in Higher Education in Sub-Saharan Africa: Ghanaian University students' experiences and perceptions
4. Beach M. (2018). When great teaching is not enough: Utilizing student perception to increase retention in online learning. In T. Bastiaens J. Van Braak M. Brown L. Cantoni M. Castro R. Christensen G. Davidson-Shivers K. DePryck M. Ebner M. Fominykh C. Fulford S. Hatzipanagos G. Knezek K. Kreijns G. Marks E. Sointu E Korsgaard Sorensen J. Viteli J. Voogt P. Weber E. Weippl and O. Zawacki-Richter (Eds.) Proceedings of EdMedia: World conference on educational media and technology (pp. 1940–1944). Association for the Advancement of Computing in Education (AACE). https://www.learntechlib.org/primary/p/184431/
5. Self-regulated learning strategies & academic achievement in online higher education learning environments: A systematic review