deletions | additions       diff --git a/bibliography/refs.bib b/bibliography/refs.bib  index 47fb9de..0381dff 100644  --- a/bibliography/refs.bib  +++ b/bibliography/refs.bib 
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@article{Eysenbach_2011,   title={Can Tweets Predict Citations? {M}etrics Metrics  of Social Impact Based on Twitter and Correlation with Traditional Metrics of Scientific Impact}, volume={13},   DOI={10.2196/jmir.2012}, abstractNote={Citations in peer-reviewed  articles and the impact factor are generally accepted measures of  scientific impact. Web 2.0 tools such as Twitter, blogs or social  bookmarking tools provide the possibility to construct innovative  article-level or journal-level metrics to gauge impact and  influence. However, the relationship of the these new metrics to  traditional metrics such as citations is not known.},  number={4},  journal={Journal of Medical Internet Research},  author={Eysenbach, Gunther},  year={2011},  month={Dec},   pages={e123} pages={123}  }  @article{brody,  Author = {Brody, Tim and Harnad, Stevan and Carr, Leslie},  Date-Modified = {2012-01-23 19:07:47 -0500},