A peer-reviewed journal article is a research article published in an academic journal. The article is "peer-reviewed" meaning it is reviewed and accepted as good enough for publication by experts in a subject.
The following links are to what are considered Interdisciplinary Database, meaning they contain articles from many different subjects. You can filter by Subject on the database's page if you would like to see databases specific to a subject.
All of the following database links can be found on the the Databases page