Tumasjan, A., Sprenger, T., Sandner, P. and Welpe, I. 2010. Predicting Elections with Twitter: What 140 Characters Reveal about Political Sentiment. Proceedings of the International AAAI Conference on Web and Social Media. 4, 1 (May 2010), 178-185. DOI:https://doi.org/10.1609/icwsm.v4i1.14009.