Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.

Yale Library

Systematic Reviews: Planning, Writing, and Supporting: Databases / Grey Literature

Selecting Databases



Sources for Finding Databases


Citation lists of retrieved articles

Handsearching of key journals

Personal communication with experts in the field

Finding Grey Literature


Clinical Trials/Results Databases

Conference Proceedings

Other Library Guides

Articles, Books, Chapters

Armstrong R, Jackson N, Doyle J, Waters E, Howes F. It's in your hands: the value of handsearching in conducting systematic reviews of public health interventions. J Public Health. 2005;27(4):388-391.

Helmer D, Savoie I, Green C, Kazanjian A. Evidence-based practice: extending the search to find material for the systematic review.  Bull Med Libr Assoc. 2001 Oct;89(4):346-52. PMID:11837256; PMCID: PMC57963

Hopewell S, Clarke MJ, Lefebvre C, Scherer RW. Handsearching versus electronic searching to identify reports of randomized trials. Cochrane Database of Systematic Reviews 2007, Issue 2. Art. No.: MR000001. DOI: 10.1002/14651858.MR000001.pub2.

Hopewell S, McDonald S, Clarke M, Egger M. Grey literature in meta-analyses of randomized trials of health care inventions. Cochrane Database of Systematic Reviews 2007, Issue 2. Art No.: MR000010. PMID: 17443631

Information Service, Centre for Reviews and Dissemination. Finding studies for systematic reviews: a resource list for researchers. Centre for Reviews and Dissemination, University of York, July 2010.