WASET
    Dongmin Cai and  Stephen S-T Yau,  Categorical Clustering By Converting Associated Information.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2007, vol. 11(11). 3675 - 3680
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10718.