@article{dodds2009b,
  title={Measuring the Happiness of Large-Scale Written Expression: Songs, Blogs, and Presidents},
  author={Chris Danforth and Peter Sheridan Dodds},
  journal={Journal of Happiness Studies},
  volume={11},
  pages={444-456},
  journalpage={http://link.springer.com/article/10.1007%2Fs10902-009-9150-9},
  year={2010},
  citations={}
}