Shafiq ur Rehman and  Jane Coughlan,  An Efficient Mobile Payment System Based On NFC Technology.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 811 - 815
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/7277.