WASET
    Norashikin Ahmad and  Damminda Alahakoon,  Generating Concept Trees from Dynamic Self-organizing Map.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2010, vol. 41(5). 955 - 960
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/7922.