Sibren Isaacman Margaret Martonosi Potential for collaborative caching and prefetching in largely-disconnected villages. 23-30 2008 Wireless Networks and Systems for Developing Regions http://doi.acm.org/10.1145/1410064.1410070 conf/mobicom/2008winsdr db/conf/mobicom/winsdr2008.html#IsaacmanM08