Yi Feng and  Jingwen Li and  Lei Huang and  Changping Liu,  Real-time ROI Acquisition for Unsupervised and Touch-less Palmprint.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2011, vol. 54(6). 668 - 672
    [viewed 20 October 2021]. Available from: https://publications.waset.org/pdf/8883.