To find an article for which you know the details of publication (title, author, journal, date), you should use the Library's OneSearch which you can access either from the library home page, either on the Articles/Database tab or from its own self-titled tab. Within the Advanced search option, you can enter some of the above-mentioned details to locate the article.
If you still have difficulty, you can search by the journal title through the Journal Titles link, which is also on the library home page. The results page will indicate which databases contain the journal, and for which years. Select an appropriate database, and click on the year and volume of the journal that contains the article.