Works of criticism and analysis are those that take a more in-depth approach to dissecting the technical/stylistic aspects, impact, or influence or a composer or work. These are written by scholars of music for an audience of scholars, which is why background information sources are helpful for building the knowledge needed to understand the arguments or assertions being made.
Music is part of the humanities; compared to scholarly articles from the sciences, writing in the humanities may seem less structured. There are still strategies you can use to make the process easier, however.
Multidisciplinary archive of journals, ebooks, images, and primary sources. Most recent issues may be embargoed.