Pham Van Nha and  Le Cam Binh,  Model of Optimal Centroids Approach for Multivariate Data Classification.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2021, vol. 171(3). 31 - 36
    [viewed 03 June 2023]. Available from: https://publications.waset.org/pdf/10011903.