NTFFPU is Platinum/Diamond Open Access edition.

According to the official definition of open access provided in the Declaration of the Budapest Open Access Initiative (BOAI), published materials are freely available on the public internet. In addition to that, NTFFPU provides Platinum (or Diamond) open access which means authors are not charged any fees for processing and publishing of their paper.

Copyright and Content Licensing

NTFFPU follows the regulations of the European Copyright Code and is published under CC BY-NC license (Creative Commons Attribution Non-Commercial 4.0 International Public License). According to this license, all articles are freely available for reading, downloading and sharing for the purposes of non-commercial use in scholarly research and education (given that the appropriate credit is provided).


Copyright for articles published in Naučni trudove – Plovdivski universitet Paisij Hilendarski. Kniga Filologiâ (Научни трудове на Пловдивския университет „Паисий Хилендарски“ – Филология) is retained by the authors while first publication rights are granted to the edition. The edition is not responsible for subsequent uses of the work. Should a third party want to use the article for commercial purposes, it needs to get the author’s permission first.