The link to the article I have noted in my paper would not open.
If the article was found in a database, go back to the database and find the article again by duplicating your original search or searching by the author or title from your citation.
Once you find the article, be sure that you are using the proper URL for the linking to the article. Often, the URL in the address bar at the top of the browser window is not meant to be used to return to the article. Look for a "persistent URL", a "permalink", or a "DOI". Any of these will be permanent links to the article.
See a Reference Librarian for further help.