Schiller, Eva-Maria, Dagmar Strohmeier, and Christiane Spiel. 2009. “Are Video and Computer Games a Risk? Playing Video-and Computer Games and Aggression in 12-and 16- Year Old Adolescents”. Swiss Journal of Educational Research 31 (1):75-98. https://doi.org/10.24452/sjer.36.1.4809.