Publisher Restrictions Regarding Copyright and Self-archiving
Authors can check whether they are allowed by their publisher to upload the publisher's pdf of their article or
chapters, or whether they can simply upload a copy of the final peer-reviewed manuscript, and what else is
involved (e.g., linking to the published version with DOI).

See website:

http://www.sherpa.ac.uk/romeo/search.php

(right click on link above then choose to open in new tab)