Cornelius, C., Fedewa, A., & Toland, M. (2020). A classroom-based physical activity intervention for adolescents: Is there an effect on self-efficacy, physical activity, and on-task behavior?. Health Psychology Report, 8(4), 408–427. Pobrano z https://czasopisma.bg.ug.edu.pl/index.php/HPR/article/view/5414