Scholarly journals are also called academic or peer-reviewed journals. A scholarly article is one that is written by scholars holding advanced degrees or other experts in that field. Peer-reviewed journals refer only to those scholarly journals that submit articles to several other scholars, experts, or academics (peers) in the field for review and comment. These reviewers must agree that the article represents properly conducted original research or writing before it can be published. Non-fiction books written by experts in their field and published by academic presses are also considered scholarly.