Li, Jie; Burnham, Judy F.; Lemley, Trey; Britton, Robert M. (2010). "Citation Analysis: Comparison of Web of Science®, Scopus™, SciFinder®, and Google Scholar". Journal of Electronic Resources in Medical Libraries. 7 (3): 196–217. doi:10.1080/15424065.2010.505518. S2CID62564372.
Li, Jie; Burnham, Judy F.; Lemley, Trey; Britton, Robert M. (2010). "Citation Analysis: Comparison of Web of Science®, Scopus™, SciFinder®, and Google Scholar". Journal of Electronic Resources in Medical Libraries. 7 (3): 196–217. doi:10.1080/15424065.2010.505518. S2CID62564372.