Aaqif Afzaal Abbasi and  Javaid Iqbal and  Akhtar Nawaz Malik,  A Novel QoS Optimization Architecture for 4G Networks.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 240 - 242
    [viewed 25 January 2020]. Available from: https://publications.waset.org/pdf/2454.