Krampen, Günter. “Cross-Sequential Results on Creativity Development in Childhood Within Two Different School Systems: Divergent Performances in Luxembourg Versus German Kindergarten and Elementary School Students”. Europe’s Journal of Psychology 8, no. 3 (August 29, 2012): Article e468. Accessed May 9, 2026. https://ejop.psychopen.eu/index.php/ejop/article/view/468.