@article{Mohammad2015,
author = {Mohammad, S.M. and Zhu, X. and Kiritchenko, S. and Martin, J.},
title= {Sentiment, emotion, purpose, and style in electoral tweets},
year = {2015},
doi = {10.1016/j.ipm.2014.09.003},
volume = {51},
number = {4},
pages = {480--499},
}