Google Scholar : (Google > More [top bar, right] > Google Scholar) : A freely accessible Web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines. Google Scholar index includes most peer-reviewed online journals of Europe and America's largest scholarly publishers. It is similar in function to the freely available Scirus from Elsevier, CiteSeerX, and getCITED. Because most of Google Scholar's search results link directly to commercial journal articles, a majority of the time users will only be able to access a brief summary of the articles topics, as well as small amounts of important information regarding the article, and possibly have to pay a fee to access the entire article. Through its "cited by" feature, Google Scholar provides access to abstracts of articles that have cited the article being viewed.--from Wikipedia