Bollen J, de Sompel HV, Smith JA, Luce R "Toward alternative metrics of journal impact: A comparison of download and citation data" Information Processing & Management 41(6): 1419-1440. December 2005
Brody, T. "Citebase Search: Autonomous Citation Database for e-print Archives" sinn03 Conference on Worldwide Coherent Workforce, Satisfied Users - New Services For Scientific Information, Oldenburg, Germany, September 2003
Brody, T., et al. Citation Impact of Open Access Articles vs. Articles Available Only Through Subscription ("Toll-Access") Ongoing study, citebase.eprints.org/isi_study/
Rachel Hardy, Charles Oppenheim, Tim Brody, and Steve Hitchcock: Open Access Citation Information, September 2005 (105pp), eprints.ecs.soton.ac.uk/11536/
Harnad, S., Brody, T., Vallieres, F., Carr, L., Hitchcock, S., Gingras, Y., Oppenheim, C., Stamerjohanns, H. and Hilf, E. "The Access/Impact Problem and the Green and Gold Roads to Open Access" Serials Review, Vol. 30, No. 4, 310-314. 2004
Kurtz MJ, Eichhorn G, Accomazzi A, Grant C, Demleitner M, Henneken E, Murray SS "The effect of use and access on citations " Information Processing & Management 41 (6): 1395-1402 December 2005
Steve Lawrence, C. Lee Giles, Kurt Bollacker: Digital Libraries and Autonomous Citation Indexing In: IEEE Computer, Volume 32, Number 6, pp. 67-71, 1999
Lawrence, S. "Free online availability substantially increases a paper's impact" Nature, 31 May 2001
Herbert Van de Sompel, Jeroen Bekaert, Xiaoming Liu, Luda Balakireva, Thorsten Schwander: "aDORe: A Modular, Standards-Based Digital Object Repository" The Computer Journal 2005 48(5):514-535, comjnl.oxfordjournals.org/cgi/content/abstract/48/5/514
Gerard van Westrienen, Clifford A. Lynch: "Academic Institutional Repositories - Deployment Status in 13 Nations as of Mid 2005" D-Lib Magazine September 2005 Volume 11 Number 9, www.dlib.org/dlib/september05/westrienen/09westrienen.html
University of Wolverhampton and Loughborough University: "User Needs and Potential Users of Public Repositories: An Integrated Analysis", project report, cybermetrics.wlv.ac.uk/DigitalRepositories/