In order to provide free access to readers, and to cover the costs of peer-review, copyediting, typesetting, long-term archiving, and Journal management, an Article Publishing Charge (APC) is applied to papers accepted after peer-review. 

Please note that for papers submitted since 1 January 2022, a fixed APC of 400 EUR is going to be applied (minimum manuscript extent is 6 pages; maximum manuscript extent is not limited).