Dan Gao Jueping Cai Zan Li Xing Wei Rei Chen Credit Token Based Dynamic Resource Renting and Offering Mechanism for Cognitive Radio WRAN BS Spectrum Sharing. 296-300 2008 AINA Workshops http://doi.ieeecomputersociety.org/10.1109/WAINA.2008.95 conf/aina/2008w db/conf/aina/ainaw2008.html#GaoCLWC08