Teodora Bakardjieva and  Galya Gercheva,  Knowledge Management and e-Learning –An Agent-Based Approach.   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2011, vol. 52(4). 360 - 363
    [viewed 27 February 2020]. Available from: https://publications.waset.org/pdf/1736.