All articles published by Scientific Letters of the University of Bielsko-Biala: Engineering Studies (SLUBBES) are made immediately available worldwide under an open access license. This means:

• everyone has free and unlimited access to the full-text of all articles published in MDPI journals;
• everyone is free to re-use the published material if proper citation of the original publication is given.

No special permission is required to reuse all or part of article published by SLUBBES, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. Reuse of an article does not imply endorsement by the authors or SLUBBES. Furthermore, no special permission is required for authors to submit their work to external repositories. This policy extends to all versions of a paper: submitted, accepted, and published.