@TECHREPORT{
       Author = {Jamakovic, A. and Mahadevan, P. and Vahdat, A. and Boguñá, M. and Krioukov, D.}, 
       Title = {{How Small Are Building Blocks of Complex Networks}},
       Institution = {arXiv physics.soc-ph/0908.1143},
       Month = {Sep},
       Year = {2009},
       Keywords = {routing   topology}
}