SEP provides access to the following product types:

-	Article
-	Individual journal issue
-	Subscription to electronic version of journal
-	Paid additional system service

When you purchase an article, you receive a PDF file containing the full text of the ordered article, or, if you prefer, a ZIP archive of this file. You can download this file from our website, or receive it via e–mail. The limitation on using e–mail is the size of your personal e–mailbox.

When you purchase an individual journal issue, you receive a ZIP archive containing articles and a special table of contents file.

Subscription allows you to access all PDF files of articles of all journal issues that were published during the subscription period, as well as to issues to be published during this period. The system automatically informs subscribers via e–mail of the publication of the next issue. Additionally, all subscribers can perform advanced searches.

The paid additional services allow you to use certain system resources. Presently, the only paid additional service is advanced search. For details, see “Services”.

Note.
Only a registered user can purchase products.