WASET
    Kriddikorn Kaewwongsri and  Nikom Suvonvorn,  Automatic Checkpoint System Using Face and Card Information.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2016, vol. 109(1). 28 - 33
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10003361.