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Systematic Reviews And Other Review Types

This guide will assist you in starting your systematic, scoping and other reviews.

Gray Literature Sources

Gray Literature, put simply, is scholarly material that hasn't been published and/or peer-reviewed. For example, government documents such as white papers, student dissertations, or conference proceedings and minutes.

illustration word cloud of potential gray literature sources

Finding these studies can be difficult, but there are a few online resources that can be used to discover this type of unpublished research.

  • Google Scholar - This resource finds a lot of papers and studies that are kept at academic institutions.
  • The Grey Literature Report - This is a resource that is produced by the New York Academy of Medicine.
  • OpenGrey - This search engine looks through unpublished resources that can be found in Europe.
  • Opendoar - OpenDOAR is the quality-assured, global Directory of Open Access Repositories. 
  • TWU Repository - Research produced by TWU students, faculty, and staff.