Zulhadi Zakaria and  Nor Ashidi Mat Isa and  Shahrel A. Suandi,  A Study on Neural Network Training Algorithm for Multiface Detection in Static Images.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 345 - 348
    [viewed 16 December 2019]. Available from: https://publications.waset.org/pdf/10292.