Researchers may share articles between themselves if this is permitted by agreements with their publishers, the so-called ‘scholarly sharing.’ Please refer to  Sherpa/Romeo external linkto check current terms for the journal in question. When using the plug-in Open Access Buttonexternal link and hitting paywalled articles, requests to authors are sent asking them to deposit their articles in an open institutional or subject repository. There are also a number of social platforms for researchers, e.g. ResearchGateexternal link and  Academia.eduexternal link.