@proceedings{liu2011greening,
  title = {Greening geographical load balancing}
  author = {Liu, Zhenhua and Lin, Minghong and Wierman, Adam and Low, Steven H. and Andrew, Lachlan L.H.},
  url = {http://portal.acm.org/citation.cfm?doid=1993744.1993767},
  year = {2011}
}