Ckhalil, Fatima El, et al. “Investigation of Sleep Patterns in the UG Foreign Students Regarding to Stressogenic Factors and Depression (Pilot Study”. Caucasus Journal of Health Sciences and Public Health, vol. 4, no. 5, Dec. 2020, pp. 52-53, https://caucasushealth.ug.edu.ge/index.php/caucasushealth/article/view/316.