Bagoly-Simó Péter, och Anke Uhlenwinkel. ”Why Physical Geography? An Analysis of Justifications in Teacher Magazines in Germany”. Nordidactica. Journal of Humanities and Social Science Education, vol. 6, nr 2016:1, november 2016, s. 23-37, https://journals.lub.lu.se/nordidactica/article/view/19020.