Ehlers, Ulf-Daniel. “Making Open Educational Practices Real. The Case of ‘The Grand Challenge 2020’ ”. Journal of e-Learning and Knowledge Society 16, no. 4 (December 30, 2020): 56-66. Accessed April 25, 2024. http://www.je-lks.org/ojs/index.php/Je-LKS_EN/article/view/1135374.