If you have an article's Digital Object Identifier (DOI), you have the information you need at your fingertips!
For example, your DOI might look like this:
10.1111/j.1753-4887.2008.00114.x
If you add the prefix https://doi.org/ in front of your DOI string (which will always begin with a 10), you will get what is essentially a web address directly to the article or abstract.
https://doi.org/10.1111/j.1753-4887.2008.00114.x
If the article isn't free for you to read online, make a note of the article title, author's name, and publication date. Then head over to the library website to search for the full-text of the article in the online library.