Wei Hu and  Tianzhou Chen and  Qingsong Shi,  Collaborative Web-Based E-learning Environment for Information Security Curriculum.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2009, vol. 29(5). 407 - 410
    [viewed 22 October 2019]. Available from: https://publications.waset.org/pdf/9584.