Comfort, L. K., Waugh, W.L., & Cigler, B.A. (2012). Emergency management research and practice in public administration: Emergence, evolution, expansion, and future directions. Public Administration Review, 72(4), 539-547. doi:10.1111/j.1540-6210.2012.02549.x (One of the only articles I am aware of in EDM to use bibliometric methods (direct citation analysis and author citation network map)
Garfield, E. (1955). Citation indexes for science. Science, 122(3159), 108-111. Retrieved October 3, 2012, from http://garfield.library.upenn.edu/papers/science1955.pdf
Harzing, A.W. (2010). The Publish or Perish book: Your guide to effective and responsible citation analysis (Kindle edition). Available from http://www.harzing.com/pop.htm
Osareh, F. (1996a). Bibliometrics, citation analysis, and co-citation analysis: A review of literature I. Libri 46, 149-158. Available from http://www degruyter.com
Osareh, F. (1996b). Bibliometrics, citation analysis, and co-citation analysis: A review of literature II. Libri 46, 217-225. Available from http://www degruyter.com
Reid, E. O. F. (1997). Evolution of a body of knowledge: An analysis of terrorism research. Information Processing & Management, 33(1), 91-106. doi:10.1016/S0306-4573(96)00052-0
Small, H. (1973). Co-citation in the scientific literature: A new measure of the relationship between two documents. Journal of the American Society for Information Science, 24(4), 265-269. Retrieved September 21, 2012, from http://polaris.gseis.ucla.edu/gleazer/296_readings/small.pdf (this is the article where Small first proposes the idea of co-citation).