WASET
    Larbi Omar and  Elberrichi Zakaria,  Clustering Methods Applied to the Tracking of user Traces Interacting with an e-Learning System.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 1015 - 1019
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/15037.