Try these databases first to find scholarly articles in Ancient History & Classics.
You don't use TOPCAT to find articles.
The Finding Articles tutorial explains the process in more detail.
These are links to various tutorials for scholarly articles.
Too few articles:
Too many articles:
Interlibrary loan is a system that allows you to request material from other libraries to be sent to Trent for you to borrow. Normally, there are no costs to use the ILL service. Plan ahead because it can take a few days or even weeks for material to be sent, depending upon availability.