Scholarly, peer-reviewed, or academic journal articles are a critical source of authoritative information as they contain the results of original and most-up-to-date research, often focus on a particular aspect of a topic and are written by experts in a field of study.
Peer review is the evaluation of scientific or academic work by others working in the same field.
A peer-reviewed or refereed journal is one in which manuscripts submitted by authors are reviewed by experts on the topic.