John R. Douceur James W. Mickens Thomas Moscibroda Debmalya Panigrahi Brief announcement: collaborative measurement of upload speeds in P2P systems. 338-339 2009 PODC http://doi.acm.org/10.1145/1582716.1582798 conf/podc/2009 db/conf/podc/podc2009.html#DouceurMP09