Open access statement

Issues of the journal are openly accessible in electronic format. Any user is permitted to read, download, copy, distribute, print, search, or link to the full texts of its articles and to use them for any other lawful purpose. All the articles published in this journal are free to access immediately from the date of publication. We do not charge any fees for any reader to download articles for their own scholarly use. The editorial board allows the reproduction of articles, free of charge, for non-commercial use only and with the appropriate citation information. All authors publishing in the journal accept these as the terms of publication.