Wang, Disi, Mohammed Samaka, Yongwu Miao, Zeyad Ali, and H. Ulrich Hoppe. 2016. “A Model-Driven PBL Application to Support the Authoring, Delivery, and Execution of PBL Processes”. Research and Practice in Technology Enhanced Learning 11 (February). https://rptel.apsce.net/index.php/RPTEL/article/view/2016-11006.