Symalla, Carmen. “Der PISA-Schock. Kippt Das Deutsche Bildungssystem?”. https://revistascientificas.us.es/index.php/mAGAzin/issue/view/938, no. 12 (January 1, 2009): 47–59. Accessed August 17, 2024. https://revistascientificas.us.es/index.php/mAGAzin/article/view/8135.