Ramírez-Becker, Kordula. “Fundgrube Projektunterricht”. https://revistascientificas.us.es/index.php/mAGAzin/issue/view/938, no. 6 (January 1, 2009): 19–36. Accessed July 17, 2024. https://revistascientificas.us.es/index.php/mAGAzin/article/view/8226.