'PubMed comprises more than 28 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher websites.'
This is a free search engine but it will not necessarily link you to full-text documents, though you can select ‘Free full text’ from the left menu bar to limit your search to open source items. Otherwise, you can use it much like Google Scholar to find titles, and then search for them in MultiSearch or the library's A-Z databases. If not owned by the library, titles may be requested via our Interlibrary Loan service.