Lothian, Jeremy, and Jungwoo Ryoo. 2013. “Critical Factors and Resources in Developing a Game-Based Learning (GBL) Environment Using Free and Open Source Software (FOSS)”. International Journal of Emerging Technologies in Learning (iJET) 8 (6):pp. 11-20. https://doi.org/10.3991/ijet.v8i6.2918.