From: The comparative recall of Google Scholar versus PubMed in identical searches for biomedical systematic reviews: a review of searches used in systematic reviews
Number of included references
Number of includes retrieved by
Authors’ search
Improved search
Javan
68
29
61
Hasani
78
51
67
Verhoeven
89
81
Navarese
17
5
Novak
30
19
26
Gupta
16
8
12
Hardefeldt
18
23
324
197 (61%)
275 (85%)