Mostafavi, Z. O. S., Kamal Kharazi, S. A. N., & Narenji Thani, F. "Investigation of Students Interaction in E-learning Environment; Case Study: Mehralborz Higher Education Institute", Teaching and Learning Research, 13, 1, 2020, 21–36. doi: 10.22070/tlr.2016.13.1.21