Follow the Leads to Other Sources
It's like getting a bonus for your work
At the end of articles in subject encyclopedias you'll usually find a list of sources that the author recommends. These sources tend to be academic in nature, and might be articles, books or web sites. This list may be called Works Cited, Bibliography, or Sources, but the purpose is the same: to lead you to additional good sources.
You might also find a See Also or Cross-References list that will lead you to other ideas and keywords.