When you've found relevant and useful resources, use citation mining (sometimes called "following a citation trail") to discover more.
Cited reference searching is available in many databases that index as well as Google Scholar. Cited reference searching is the ability to search for other articles that cite a certain article.
Cited reference searching should have a search strategy broad enough to allow for the following pitfalls.
Our library guide on "Databases that track citations: measuring research impact" will guide you through the process.