Since I don’t have access to an architecture library at the moment, I’ve had to improvise. Old theses are available online as PDFs, so I’ve been searching for ones that seem related to what mine might be, and seeing who they cite.
So far, Kevin Lynch, Aldo Rossi, Alan Berger, and Alois Riegl stand out as being cited by multiple people. A good place to start once I get back to school.