Todorova, Margarita, Vanya Tzonkova, and Nevena Byanova. “Serious Games in Economics”. Digital Presentation and Preservation of Cultural and Scientific Heritage 2 (September 30, 2012): 187–192. Accessed May 4, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2012.2.14.