@article{Mitchell2013,
author = {Mitchell, L. and Frank, M.R. and Harris, K.D. and Dodds, P.S. and Danforth, C.M.},
title= {The geography of happiness: Connecting Twitter sentiment and expression, demographics, and objective characteristics of place},
year = {2013},
doi = {10.1371/journal.pone.0064417},
volume = {8},
number = {5},
pages = {e64417},
}