Advances in Web-Based Learning - ICWL 2019 18th International Conference, Magdeburg, Germany, September 23-25, 2019, Proceedings - Herzog, Michael A.; Herzog, Michael A.; Kubincová, Zuzana; Kubincová, Zuzana; Han, Peng; Han, Peng; Temperini, Marco; Temperini, Marco (Springer International Publishing : Imprint: Springer, 2019)