<P> As of July 2013, Google Scholar is not yet available to the Google AJAX API . </P> <P> Google Scholar's legal database of US cases is extensive . Users can search and read published opinions of US state appellate and supreme court cases since 1950, US federal district, appellate, tax and bankruptcy courts since 1923 and US Supreme Court cases since 1791 . Google Scholar embeds clickable citation links within the case and the How Cited tab allows lawyers to research prior case law and the subsequent citations to the court decision . The Google Scholar Legal Content Star Paginator extension inserts Westlaw and LexisNexis style page numbers in line with the text of the case . </P> <P> While most academic databases and search engines allow users to select one factor (e.g. relevance, citation counts, or publication date) to rank results, Google Scholar ranks results with a combined ranking algorithm in a "way researchers do, weighing the full text of each article, the author, the publication in which the article appears, and how often the piece has been cited in other scholarly literature". Research has shown that Google Scholar puts high weight especially on citation counts and words included in a document's title . As a consequence, the first search results are often highly cited articles . </P> <Table> <Tr> <Td> </Td> <Td> This article is in a list format that may be better presented using prose . You can help by converting this article to prose, if appropriate . Editing help is available . (October 2017) </Td> </Tr> </Table>

What criteria are used to rank results in google scholar