In PubMed @ UMSL, you have a better-than-average chance of finding free full-text articles associated with the citations because
A In Summary view, if free full text is available, you will usually see a Free PMC article or Free article link between the title and abstract.

B Sometimes UMSL will have access to articles that don't display such a link. To check, copy the article’s title and paste it into Discover@UMSL (the search tool on the library’s homepage) to see if a PDF is available.

C In Abstract view and on the detailed record pages, button-style links are used, making the source of the articles clear at a glance. The examples shown below are from two different results. The first button in each row directs you to the publisher’s website; open access articles are free, but other publishers’ full-text articles often are not, so always try buttons that say “free,” “open access,” or “UMSL” first. There’s no need to pay for articles!

Clicking on the Find it @ UMSL button will pull up a new, Full Text Finder Results page. You may see one or more resource links that will take you to a PDF, or you’ll see a Request this Item Through Interlibrary Loan link. If you place an Interlibrary Loan (ILL) request, you’ll receive an email with a link to the article’s PDF within a few days. If you don't receive an email, check your spam folder.
TIP If an article looks promising, pay attention to the authors and keywords.
To reduce some of your frustration, it may be worthwhile to filter your results so you only see articles that are available in full text or free full text.
NOTE Provided you've built time for research into your schedule, you have choices!