00437nas a2200181   4500000000100000000000100001008004100002260000800043100001000051700001700061700001300078700001300091700001100104245010500115300001400220490000700234022001400241       2017                            d  cNov1 aJ. Du1 aErol Gelenbe1 aC. Jiang1 aH. Zhang1 aY. Ren00aContract Design for Traffic Offloading and Resource Allocation in Heterogeneous Ultra-Dense Networks  a2457-24670 v35  a0733-8716