Michael Sirivianos Jong Han Park Xiaowei Yang Stanislaw Jarecki Dandelion: Cooperative Content Distribution with Robust Incentives. 157-170 2007 conf/usenix/2007 USENIX Annual Technical Conference http://www.usenix.org/events/usenix07/tech/sirivianos.html db/conf/usenix/usenix2007.html#SirivianosPYJ07