Information For Readers

Reading: All of our articles become open-access 24 months after initial publication. Access to articles published within the last 24 months is restricted to subscribers. A 12-months personal subscription costs US$25 and US$150 for institutions (e.g., libraries). For subscription, click here. For open-access materials, instructors, professors, or other users are encouraged to copy/paste our article DOI numbers directly onto their online syllabi for easy click-through for users. (This also helps us to document our readership.)

Storage and sharing: Apart from purely private storage, any reproduction, reprinting, or any other form of sharing of our materials in any form or format requires our explicit, written permission. In particular, we do not permit our articles to be stored on institutional servers or on services such as or If you wish to share one or more of our articles, simply direct people to our article link(s) or DOI number(s) so that articles are accessed on our own servers. Thank you.