Schiller, E.-M., Strohmeier, D. and Spiel, C. 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 (Jun. 2009), 75–98. DOI:https://doi.org/10.24452/sjer.36.1.4809.