WASET
    G. M. Mir and  Moinuddin and  N. A. Shah,  Mobile Velocity Based Bidirectional Call Overflow Scheme in Hierarchical Cellular System.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2009, vol. 34(10). 1864 - 1867
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/13381.