Comparison of PubMed, Scopus, Web of Science, and Google Scholar: strengths and weaknesses

@article{Falagas2008ComparisonOP,
  title={Comparison of PubMed, Scopus, Web of Science, and Google Scholar: strengths and weaknesses},
  author={Matthew E. Falagas and Eleni I Pitsouni and George Malietzis and Georgios Pappas},
  journal={The FASEB Journal},
  year={2008},
  volume={22},
  pages={338 - 342}
}
The evolution of the electronic age has led to the development of numerous medical databases on the World Wide Web, offering search facilities on a particular subject and the ability to perform citation analysis. [] Key Method The official Web pages of the databases were used to extract information on the range of journals covered, search facilities and restrictions, and update frequency.
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