Editing Encyclopedia:Search engine test (section)

==Specialized search engines==
[[Google Scholar]] works well for fields that are paper-oriented and have an online presence in all (or nearly all) respected venues. This search engine is a good complement for the commercially available Thompson ISI Web of Knowledge, especially in the areas which are not well covered in the latter, including books, conference papers, non-American journals, the general journals in the field of strategy, management, international business,<ref name="Harzing">Harzing, A. W. K.; van der Wal, R. (2008). Google Scholar as a new source for citation analysis? ''Ethics in Science and Environmental Politics'', vol. 8, no. 1, pp. 62–71</ref>  English language education and educational technology.<ref name="Aalst">van Aalst, Jan. (2010) Using Google Scholar to Estimate the Impact of Journal Articles in Education. ''Educational Researcher'' 39: 387.</ref> The analysis of the [[PageRank]] algorithm utilised by Google Scholar demonstrated that this search engine, as well as its commercial analogs, provides an adequate information about popularity of some concrete source,<ref name="Maslov">Maslov, S.; Redner, S. (2008). Promise and pitfalls of extending Google's PageRank algorithm to citation networks. Journal of Neuroscience, 28, 11103–11105</ref> although that does not automatically reflect the real scientific contribution of concrete publication.<ref name="Maslov"/>

[[MedLine]], now part of [[PubMed]], is the original broadly based search engine, originating over four decades ago and indexing even earlier papers. Thus, especially in biology and medicine, PubMed "associated articles" is a Google Scholar proxy for older papers with no on-line presence. E.g., The journal ''Stroke'' puts papers on-line back through 1970s. For this 1978 paper [http://stroke.ahajournals.org/cgi/content/abstract/9/5/445], Google Scholar [http://scholar.google.com/scholar?q=link:http%3A%2F%2Fstroke.ahajournals.org%2Fcgi%2Fcontent%2Fabstract%2F9%2F5%2F445 lists 100 citing articles], while PubMed [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Display&itool=abstractplus&dopt=pubmed_pubmed&from_uid=705824 lists 89 associated articles]

There are a large number of [[Law library|law libraries]] online, in many countries, including: [http://www.loc.gov/law/public/law.html Library of Congress], [http://thomas.loc.gov/ Library of Congress (THOMAS)], [http://www.in.gov/judiciary/library/ Indiana Supreme Court], [http://library.findlaw.com/ FindLaw] (US); [http://www.kent.ac.uk/lawlinks/electronic-law-library/index.html Kent University Law Library and sources] (UK).

See also this [[List of search engines|list of search engines]].