@article{bliss2012a,
  title={Twitter reciprocal reply networks exhibit assortativity with respect to happiness},
  author={Cathy Bliss and Isabel Kloumann and Kameron D. Harris and Chris Danforth and Peter Sheridan Dodds},
  journal={Journal of Computational Science},
  volume={3},
  pages={388-397},
  journalpage={http://dx.doi.org/10.1016/j.jocs.2012.05.001},
  year={2012},
  citations={}
}