Achmad Nizar Hidayanto and  Elisabeth Martha Koeanan,  Journey on Image Clustering Based on Color Composition.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2010, vol. 43(7). 1188 - 1193
    [viewed 16 October 2019]. Available from: https://publications.waset.org/pdf/11825.