Here comes the second reference tip for this week:

How the Scientific Community Reacts to Newly Submitted Preprints: Article Downloads, Twitter Mentions, and Citations

“Second, we run correlation tests to investigate the relationship between Twitter mentions and both article downloads and article citations. We find that Twitter mentions follow rapidly after article submission and that they are correlated with later article downloads and later article citations, indicating that social media may be an important factor in determining the scientific impact of an article.”

Published by Xin Shuai, Alberto Pepe and Johan Bollen at http://arxiv.org/abs/1202.2461.