Kausik Halder and  Nabendu Chaki and  Ranjan Dasgupta,  Early Requirement Engineering for Design of  Learner Centric Dynamic LMS .   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2014, vol. 88(4). 1018 - 1022
    [viewed 17 October 2021]. Available from: https://publications.waset.org/pdf/9997943.