WASET
    Vedat Coskun and  Fahri Soylemezgiller and  Busra Ozdenizci and  Kerem Ok,  Development and Performance Analysis of Multifunctional City Smart Card System.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 86(2). 307 - 310
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9997568.