When conducting research, you should pay attention to two criteria:
- Sources cited in the article
The footnotes and bibliopgrahy provide provide the scholarly context for the article and document scholarly thinking on your topic up to the point of publication of the article. This method of looking at cited sources is called "backward citation searching"
- How frequently has the article been cited
Finding articles and/or books that have cited the article is also very important. It helps document the importance of the article (an article frequently cited vs an article seldomly cited). It also helps to document the evolving state of scholarship since the article was published. This method of tracing citations is called "forward citation searching"
How to conduct Forward Citation Searching
Many databases offer a "cited by" option, but the simplest approach is to search Google Scholar.
Search for the title of the article, then look for the Cited By link, underneath the reference - this will give you a list of articles and books that have cited this article.