Shuai, X., Pepe, A. & Bollen, J. (2012). How the Scientific Community Reacts to Newly Submitted Preprints:
Article Downloads, Twitter Mentions, and Citations (cite arxiv:1202.2461)

Brody, T., Harnad, S. & Carr, L. (2006). Earlier Web usage statistics as predictors of later citation impact. Journal of the American Society for Information Science and Technology, 57, 1060--1072. doi: 10.1002/asi.20373