Look on the left for "Refine my results" on the search results page.
Scroll down to "Resource Type" and click on "Show More," to see more than the first few entries.
Select "Reference Entries" (if available).
Then, "Apply Filters."
Find In-Depth Background Sources
Specialized encyclopedias, handbooks, or bibliographies are reference materials written by scholars that can offer foundational understanding and cited sources on scholarly topics.
Often a good place to get started. However, since it's not authoritative or 100% reliable, it's not a place to stop looking. Make sure to look at the references.