A.M. Fahim and  A. M. Salem and  F. A. Torkey and  M. A. Ramadan,  Density Clustering Based On Radius of Data (DCBRD).   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2008, vol. 22(10). 3464 - 3469
    [viewed 18 October 2019]. Available from: https://publications.waset.org/pdf/6157.