@article{barabasi99emergence,
  author = {Barabási, Albert-László and Albert, Réka},
  interhash = {a09e31f3baed5f4d2112ad182621f269},
  intrahash = {73f0eae7189f539854c5d59bae595942},
  journal = {Science},
  pages = {509--512},
  title = {Emergence of scaling in random networks},
  volume = 286,
  year = 1999
}