If you've run into a paywall and can't access the article you need, there are many resources available to you.
Try our Search Bar below, powered by the Open Access Button. This tool also provides a browser extension for Chrome and a web interface. If the Button can't find your article freely available, it will send a request to the author on your behalf.
For quick access to open access versions of paywalled articles, try the Unpaywall browser extension for Chrome. Unpaywall alerts you when there is a freely available version of the article available from repositories, preprint archives, or scholarly websites.
The OA and scholarly communications environments are rapidly changing, morphing, stretching, and growing. Here you'll find more resources to help you use and understand OA and keep up-to-date with OA news and initiatives.