Open Access Policy
This is an open access journal. All content is freely available without charge to the user or his/her institution. All articles are distributed under the terms of the Creative Commons Attribution License. Users are allowed to read, download, copy, distribute, print, search, and redistribute the material in any medium or format and to remix, transform, or build upon the material, even commercially, provided that the original work is properly cited.
Archives of the journal are held by the British Library. Authors are encouraged to self-archive the published articles.