Guanying Ru Hongxiang Li Siqian Liu Weiyao Lin Lingjia Liu Xudong Wang Spectrum Optimization for OFDMA Based Hybrid Wireless Networks. 1-5 2011 VTC Fall http://dx.doi.org/10.1109/VETECF.2011.6093177 conf/vtc/2011f db/conf/vtc/vtc2011f.html#RuLLLLW11