Searching repositories

How do I find documents or articles in repositories?

In addition to being able to find documents or articles in repositories via regular search engines such as Google there are also a number of specialist resources available to search for content in repositories:

Directory of Open Access Repositories (OpenDOAR)

'...provides a quality-assured listing of open access repositories around the world. OpenDOAR staff harvest and assign metadata to allow categorisation and analysis to assist the wider use and exploration of repositories'  (1)

One disadvantage of OpenDOAR is the fact that it often returns hits that are just referencing a particular article rather than the actual article itself.

Google Scholar

When searching Google Scholar, the result set may give the option of results that include 'Group of'. These results often show open access repository data. For more tips see searching Google Scholar and Advanced Scholar search tips.

OAIster

This is a search service that includes open access material as well as a wide range of digital resources.

References 
1. Directory of open access repositories, [Online] Available from: http://www.opendoar.org/index.html [Accessed 5th June 2008].