Yu Zhang and  Ye Tian and  Fang Ye Yixuan Kang,  Game-Theory-Based on Downlink Spectrum Allocation in Two-Tier Networks.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2019, vol. 150(6). 417 - 420
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/10010469.