Scientific journals are publications where researchers present their research findings in the form of articles. In many fields, journal articles are the primary way to publish and disseminate new research, making them a key source of information. Journals are mainly published by commercial academic publishers, but also by scholarly societies and universities.
The scientific quality and reliability of research published in scientific journals are ensured through peer review. Some journals are freely accessible (open access), while others are behind a paywall. University of Oulu provides students and staff with access to a wide range of scientific journals.
Information about a journal’s peer review process is often available on its website. Well-known academic publishers such as Springer, Taylor & Francis, Elsevier, and Wiley provide accurate details about their journals’ peer review practices. However, the journal’s or publisher’s website is not always a fully reliable source when evaluating the peer review process and scientific credibility. It is advisable to verify this information from independent sources as well.
A scientific journal article typically follows the IMRD structure: Introduction, Methods, Results, and Discussion. Additionally, it always includes a reference list.
Peer review does not apply to all articles and writings in a journal. Scientific journals often include various types of articles.
Non-peer-reviewed writings include:
Peer review can be confirmed by using databases that require peer review from the journals they index. Examples include:
Many subject-specific databases, such as PubMed in biomedicine, and publisher platforms like IEEE Xplore (in information and electrical engineering), also contain only peer-reviewed articles or references. Check the database’s guide or help section for details.
There are also databases that allow you to limit your search results to articles published in peer-reviewed journals by applying a peer-reviewed filter. Examples include:
Peer review can also be verified using specialised online tools. The JUFO Portal (Publication Forum) evaluates both Finnish and international scientific journals. Another useful resource is Ulrichsweb. Using these services, you can easily check whether a journal is peer-reviewed, helping you ensure that your sources meet accepted academic standards.
The JUFO Portal is a service you can use to check whether a journal is scientific (peer-reviewed) or whether a book publisher is reliable.
The Publication Forum (JUFO) is a Finnish classification system that evaluates the quality of scientific publishing. The classification includes journals, book series, conferences, and book publishers. The evaluation is carried out by discipline-specific expert panels, which categorize key domestic and international publication channels into quality levels:
3 = highest level
2 = leading level
1 = basic level
0 = do not (yet) meet the criteria for level
Not evaluated = has not yet been evaluated or is professional or non-academic.
You can search the Publication Forum database without logging in.
Although the number of evaluated publications is large, the JUFO Portal does not include all journals and book publishers in the world.
In the JUFO Portal, type the journal's name into the Free text search box. If the journal is classified at level 1, 2, or 3, it is peer-reviewed.


Level 0 includes a variety of publication channels with differing levels of quality and purpose. These may include professional magazines, questionable open access journals, university publication series, and journals that have not yet been classified.
Please note that the Publication Forum classification does not cover all scientific journals worldwide. Therefore, if a journal is not listed or is placed at level 0, it does not necessarily mean the journal is of poor quality.
If the journal is not found in the JUFO portal, try the following alternatives:
A book publisher does not need to publish only scientific books to be included in the Publication Forum (JUFO) classification. Therefore, additional criteria are needed when evaluating the quality of a book.
In the JUFO portal, enter the publisher’s name in the Free text search field. If the publisher is classified at level 1, 2, or 3, it is considered reliable.
