01

What is not accepted

—  Submitting the same manuscript, or a substantially similar one, to more than one journal at the same time.

—  Publishing the same findings or data again as if they were new (duplicate publication).

—  Splitting one study into several papers without need, or reusing a large part of the earlier work (redundant or overlapping publication).

—  Presenting previously published work as new, or publishing a translation without saying so.

02

What authors must disclose

—  Any earlier version, such as a thesis, a dissertation, a preprint, or a conference paper, and how the new manuscript differs from it.

—  Any related manuscript that is under review or published elsewhere and uses the same data or reports on the same study. A copy should be uploaded with the submission.

—  Permission from the copyright holder to reuse any material that has been published.

03

What is allowed

—  Reports of a thesis, a dissertation, or an unpublished presentation, if they are disclosed.

—  A translated article, if it identifies the original title, date, and journal, and if copyright has been obtained. See Plagiarism Policy.

—  Posting a preprint. See Preprint Policy.

04

What the journal does

Similarity screening, and the checks by the editors and reviewers, help to find overlap. Depending on the case, the journal may ask the authors to explain, compare the versions, tell the editor of the other journal, reject the manuscript, publish a correction or a notice, or retract a redundant article. See Research Misconduct and Correction, Retraction and Withdrawal.

05

Related

Plagiarism Policy  ·  Preprint Policy  ·  Research Misconduct  ·  Author Guidelines

06

Sources

This policy is based on the guidance of the Committee on Publication Ethics (COPE):