Search for articles on the medieval period in these databases:
Large, multidisciplinary article database that is a good starting point for research in many areas.
When conducting research it is important to distinguish between scholarly and popular sources. Journal articles are typically referred to as "scholarly" or "peer-reviewed" while magazine articles are usually considered "popular" or "sensational". Always know which type is acceptable for your research.
Not sure if a journal article is scholarly / academic?
Have a look at these links: