WASET
    Olaf Henniger and  Karim Lafou and  Dirk Scheuermann and  Bruno Struif,  Verifying X.509 Certificates on Smart Cards.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2008, vol. 22(10). 3476 - 3479
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/14622.