Ever come across an interesting paper that is behind a paywall? Many of these publications may also be available via green open access.
Self-archiving, also known as green open access, refers to the practice of depositing articles in an institutional repository or a subject repository such as arXiv.
However locating the open version can be a bit hit and miss given there are so many potential repositories. Fortunately oaDOI provides a simple way to search for open access versions
You can simply paste the DOI into the search engine at oadoi.org, however this web service is ideal for linking to a Safari Extension.
You can download the extension here, simply double click on the downloaded file to install the extension.
To try it out view this publication http://www.nature.com/ng/journal/v47/n4/full/ng.3260.html highlight the DOI, highlighted in red in the image below.
A digital object identifier (DOI) is a type of persistent identifier used to uniquely identify objects. The DOI system is particularly used for electronic documents such as journal articles.
Now highlight the DOI and right-click (or control-click) and select "Search for 10.1038/ng.3260 on open access DOI" from the dropdown menu.
It will open a new tab and search for an Open Access copy of the paper, if one is found it will display the publication, if not it will revert to a link to the paywalled version.
You can change where the results are displayed in the oaDOI extension preferences.