Scholarly journal articles are a valuable secondary source and can be found in disciplinary scholarly disciplinary article databases, such as these that index the literature of History, Medicine and Medieval Studies. These are created by and for scholars in their disciplines, and use the tools, language, descriptors and more from each discipline:
Note that some of these index articles and some provide full text as well, but all of them are linked to UVic Libraries collections,so you can click through to get the full text from our various subscriptions, other databases, and archival hosting sites like JStor and Project Muse. These latter sources aren't designed for searching, rather, they house back issues of a few journals from many disciplines, and we link into them from the far more useful article databases.
The databases show us what's been published in the world of that subject, not only what's available at UVic, so you may need to click through to Interlibrary Loan to request an article from another library. Never pay for articles, let the libraries get them for you (it's free for students!).