Norris M, Oppenheim C, Rowland F. Finding open access articles using Google, Google Scholar, OAIster and OpenDOAR. Online Information Review. 2008 (32)6:709-15
The purpose of this paper is to demonstrate the relative effectiveness of a range of search tools in finding open access (OA) versions of peer reviewed academic articles on the world wide web. The results indicate that, for the moment at least, to find OA articles should it is better to use the general search engines Google and Google Scholar rather than OpenDOAR or OAIster.