Jianfeng Li and  Feng Jin and  Xiaoyu Yang,  Fuzzy Clustering Analysis in Real Estate Companies in China.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 920 - 924
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/7791.