| Summary: | This is a presentation (22 slides) at the XXVI Annual Charleston Conference November 4-11, 2006 Charleston, South Carolina, of a study which examined how well three citation tracking tools (Google Scholar, Scopus, and Web of Science) cover two subject areas (physics and oncology) in two years (1993 and 2003). In a previous study (data collected in November 2005), Web of Science returned the highest average number of citations for 1993 articles in both subjects. Scopus returned the highest number for 2003 articles in oncology and Web of Science in physics. Furthermore, the study examined the overlap as well as unique citations returned by the three tools. (See http://www.bio-diglib.com/content/3/1/7). Data were updated in September 2006, and these new results are reported.
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