Abbas Nayebi Hamid Sarbazi-Azad Gunnar Karlsson Routing, data gathering, and neighbor discovery in delay-tolerant wireless sensor networks. 1-6 2009 IPDPS http://dx.doi.org/10.1109/IPDPS.2009.5161191 conf/ipps/2009 db/conf/ipps/ipdps2009.html#NayebiSK09