Malik, R., R. Rafli, S. Salmi, and Y. A. Noer. “Relationship of Sleep Quality and Oxidative Stress Level in Smartphone Users; Study in Faculty of Medicine Student, Universitas Baiturrahmah”. Open Access Macedonian Journal of Medical Sciences, vol. 10, no. B, Feb. 2022, pp. 501-5, doi:10.3889/oamjms.2022.8593.