ZSR Homepage Search
A good place to start for many topics.
Academic Search Premier
Journal articles on many subjects. Good source for most topics. In this database I recommend limiting to "Scholarly (Peer Reviewed) Journals" to avoid popular magazines.
MLA International Bibliography
Covers journal articles in the fields of literature and folklore more comprehensively than Academic Search Premier. Also includes references to individual book chapters, which is an important way of publishing in this field. You might want to limit your search to English. Important caveat: The M in MLA stands for Modern, so look elsewhere if your focus is entirely on the ancient version of a story.
ZSR Library Catalog
Best source for books.
In-depth database that focuses on Greek and Latin literature, history, etc. Despite the French name, the interface is in English.
International Medieval Bibliography (IMB)
Iter: Gateway to the Middle Ages and Renaissance
Two databases that cover all aspects of the medieval period. Many of the citations you'll find will overlap with MLA, but there is unique content as well. Go to the Advanced Search screen to limit to English.
Personal Names: L'Année Philologique uses true Latin names and Romanized Greek names for ancient authors. Most other databases use the more common English name.
Library Catalog uses: Virgil, Homer
L'Année Philologique uses: Vergilius Maro (P.), Homerus
In L'Année Philologique, use the Ancient Authors and Texts search box to find the proper form of the author's name.
L'Année Philologique and most other databases use * to cut off a word stem, e.g. gladiator* retrieves gladiators, gladiatorial.
Type the word AND (or use the second row) if you want to enter more than one word that is not an exact phrase.
Here's an example of how to use Ancient Authors and Texts to find the proper form for Cicero. Then I used the * to find Pro Sexto Roscio. In the results, the term 'roscio' appears with various case endings.
You can limit by modern language in the Advanced Search screen.