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机译:Comparison of PubMed, Scopus, Web of Science, and Google Scholar: strengths and weaknesses
Alfa Inst Biomed Sci, Athens, Greece;
Tufts Univ, Sch Med, Dept Med, Boston, MA 02111 USA;
Inst Continuing Med Educ Ioannina, Ioannina, Greece;
citation analysis; open access; Medline Institute of Scientific Information (ISI); education electronic databases; WORLD-WIDE-WEB; RESOURCES;