Citation Analysis Guide Put together by a team of librarians at U of M, this guide is designed for faculty who need information on how to use library resources for citation analysis. This includes information about impact factors, journal rankings, and how to find who has cited an article.
A Principal Component Analysis of 39 Scientific Impact Measures. Bollen, et al. focus on science fields but the study should be of general interest. They provide a principal component analysis of the rankings produced by 39 existing and proposed measures of scholarly impact that were calculated on the basis of both citation and usage log data. PLoS One. 2009; 4(6): e6022.