Dave Levin Katrina LaCurts Neil Spring Bobby Bhattacharjee Bittorrent is an auction: analyzing and improving bittorrent's incentives. 243-254 2008 SIGCOMM http://doi.acm.org/10.1145/1402958.1402987 conf/sigcomm/2008 db/conf/sigcomm/sigcomm2008.html#LevinLSB08