Rumyana Peytcheva-Forsyth and  Blagovesna Yovkova,  Using Serious Games to Improve the Preparation of Pre-Service Teachers in Bulgaria.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2012, vol. 66(6). 1281 - 1288
    [viewed 26 October 2021]. Available from: https://publications.waset.org/pdf/4271.