Ortwein, Annette, Valerie Graw, Sascha Heinemann, Tobias Henning, Johannes Schultz, Fabian Selg, Kilian Staar, and Andreas Rienow. “Earth Observation from the ISS in Classrooms - from E-Learning to M-Learning”. European Journal of Geography 8, no. 3 (January 1, 2017). Accessed October 17, 2025. https://www.eurogeojournal.eu/index.php/egj/article/view/300.