Wenjie Jiang Rui Zhang-Shen Jennifer Rexford Mung Chiang Cooperative content distribution and traffic engineering. 7-12 2008 NetEcon http://doi.acm.org/10.1145/1403027.1403030 conf/sigcomm/2008netecon db/conf/sigcomm/netecon2008.html#JiangZRC08