Malzahn N, Ziebarth S, Kloke D, Hoppe HU. Self-Enriching Ontology-Based Casual Learning Games. Comput. Inform. [Internet]. 2015 Oct. 24 [cited 2024 Nov. 8];34(3):652-77. Available from: http://147.213.75.17/ojs/index.php/cai/article/view/3224