ZAKERI, A.; OJAGHI, H.; MASOUMI, R.; KAHNAMOUEI-AGHDAM, F.; VEJDANI, M.; AMRAHI, A.; MIRZAZADEH GIGLOU, A.; ABBASI, V. Prevalence of Internet Addiction among University Students in Khalkhal city, Iran in 2015: A Cross-sectional Study. Asian Journal of Humanities and Social Studies, v. 5, n. 1, 15 Feb. 2017.