@ARTICLE{
       Author = {Motiwala, M. and Dhamdhere, A. and Feamster, N. and Lakhina, A.}, 
       Title = {{Towards a Cost Model for Network Traffic}},
       Journal = {ACM SIGCOMM Computer Communication Review (CCR)}, 
       Volume = {42},
       Number = {1},
       Pages = {54-60},
       Month = {Jan},
       Year = {2012},
       Keywords = {economics   routing}
}