Tezer, M. ., P. Ulgener, H. Minalay, A. . Ture, U. . Tugutlu, and M. G. . Harper. “Examining the Relationship Between Academic Procrastination Behaviours and Problematic Internet Usage of High School Students During the COVID-19 Pandemic Period”. Global Journal of Guidance and Counseling in Schools: Current Perspectives, vol. 10, no. 3, Dec. 2020, pp. 142-56, doi:10.18844/gjgc.v10i3.5549.