Sperisen, Vera. “Künzli, Rudolf; Fries, Anna-Verena; Hürlimann, Werner; Rosenmund, Moritz (2013). Der Lehrplan – Programm Der Schule”. Swiss Journal of Educational Research 37, no. 2 (October 24, 2018). Accessed February 23, 2025. https://sjer.ch/article/view/5211.