Q. How do I research if others have cited a specific article I am using?

The gold standard for citation searching is a database called Web of Science. It is too expensive for our library to maintain a yearly subscription. It is available at the University of Minnesota Duluth. However, due to the way database access is structured by companies, as a CSS student you would only have access to this database if you physically visit the UMD Library.

Two of our databases, Medline & CINAHL, offer PlumX Metrics, which is a "citation-seaching lite." I would be hesitant to think it authoritative.

Google Scholar does offer a a "cited by" link underneath its citations. It should offer context for you on how much an article was used. It is probably good enough, but if you want to know you were thorough (and this depends on the "why" of your question) consider using Web of Science.

ps. Remember, the newer the citation the less time people have to read an article, cite it in their paper, and then get that paper published.