Use and look for the green arrows "►" in the search results. (or if using, click on "all n versions", and then the result with the green arrow[1]).

The number of "open access" scientific papers on the Internet has been increasing[2], and Google Scholar has now started placing green arrows[3] next to those search results which are available free of charge. The green arrow does not yet identify all open access sources, and other available material can sometimes be identified by looking at its url, however it makes it much easier to ignore results from subscription journals and select those references which have been made freely accessible on the internet.

I hope people will use the green arrow more, so justifying even more improvements to Google Scholar, increasing the use of the open access publishing, and increasing the incentive to produce a better system for selecting scientific papers for publication.

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