Reza Hassanpour and  Asadollah Shahbahrami and  Stephan Wong,  Adaptive Gaussian Mixture Model for Skin Color Segmentation.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2008, vol. 17(5). 1348 - 1353
    [viewed 21 October 2019]. Available from: https://publications.waset.org/pdf/4014.