“Boredom and Lack of Control: Examination of Predictive Psychological Factors of Problematic Smartphone Use Among Hungarian Youth”. Training and Practice : Journal of Educational Sciences 18, no. 3-4 (October 23, 2020): 41–49. Accessed December 5, 2025. https://journal.uni-mate.hu/index.php/trainingandpractice/article/view/4008.