@INPROCEEDINGS{
       Author = {Shakkottai, S. and Fomenkov, M. and Koga, R. and Krioukov, D. and claffy, k.}, 
       Title = {{Evolution of the Internet AS-Level Ecosystem}},
       BookTitle = {International Conference on Complex Sciences (Complex)},
       Institution = {Texas A&M University},
       Month = {Feb},
       Year = {2009},
       Keywords = {policy   routing   topology}
}