@article{frank2013a,
  title={Happiness and the Patterns of Life: A Study of Geolocated Tweets},
  author={Morgan Frank and Lewis Mitchell and Peter Sheridan Dodds and Chris Danforth},
  journal={Nature Scientific Reports},
  volume={3},
  pages={2625},
  journalpage={http://www.nature.com/srep/2013/130911/srep02625/full/srep02625.html},
  year={2013},
  citations={65}
}