Kosmas Dimitropoulos and  Athanasios Manitsaris and  Ioannis Mavridis,  Building Virtual Reality Environments for Distance Education on the Web: A Case Study in Medical Education.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2007, vol. 11(11). 645 - 653
    [viewed 17 October 2019]. Available from: https://publications.waset.org/pdf/3775.