Beiyu Rong Anthony Ephremides On Opportunistic Cooperation for Improving the Stability Region with Multipacket Reception. 45-59 2009 NET-COOP http://dx.doi.org/10.1007/978-3-642-10406-0_4 conf/netcoop/2009 db/conf/netcoop/netcoop2009.html#RongE09