...
The LibKey.io application is not only a destination platform for doing quick and easy DOI and PMID lookups but is also a powerful URL linking syntax for navigating to full text for nearly 1,000 organizations and more than 10 Million researchers worldwide. Using LibKey.io in your application allows you to improve the user experience over simply linking to PubMed abstracts (and hoping for a PubMed Central OA link to be available) or linking by DOI to a publisher site. Both of these strategies suffer from common fragilities:
...