Open access: This is an open access journal. It means permanent and free access to published scientific works for readers and no publication fees for the authors – it is 100% free. Importantly, authors retain copyright of their work and allow it to be shared and reused, provided that it is correctly cited. Readers anywhere in the world may download, share or use the work, free of charge, providing that it is correctly cited. 

Copyright: Articles are published under the CC BY 4.0 license (Attribution 4.0 International).

DOI: Each published article has its unique DOI (Digital object identifier).