We recommend the following:
Browser extensions / plug-ins will check on publisher’s platforms if an Open Access version of an article is freely available.
Authors generally retain the right of “scholarly sharing” when publishing in a journal. If contacted directly, they can share their content with interested researchers.
Send an inquiry directly to an author, asking if the content can be shared directly with you.
If all of the above should fail: contact us at email@example.com and we will check if there’s any other option to get to the requested fulltext.