Mayr P, Walter A K. An exploratory study of Google Scholar. Online Information Review 2007;31(6):814-830
The purpose of the paper is to discuss the new scientific search service Google Scholar (GS), born to search exclusively scholarly documents, and to test its functionality. The study, based on queries against different journal lists, showed some deficiencies in coverage and up-to-datedness of GS index and pointed out the most important sources of this kind of service, such as the commercial academic publishers, currently the main data providers. Through the analysis of a huge amount of data from this search engine, the study concludes that GS has some interesting pros but cannot be used as substitute of specialized databases and catalogues.