Zheng Zhang Ming Zhang Albert G. Greenberg Y. Charlie Hu Ratul Mahajan Blaine Christian Optimizing Cost and Performance in Online Service Provider Networks. 33-48 2010 NSDI http://www.usenix.org/events/nsdi10/tech/full_papers/zhang.pdf conf/nsdi/2010 db/conf/nsdi/nsdi2010.html#ZhangZGHMC10