Repository policy

Articles used
Only the final version of the article prepared by the publisher and the extended version of the online publication, which are post-review articles, may be used. Use of the author's final version of the article and the pre-review version is not permitted.

Permitted sites

- Institutional repositories of domestic and foreign universities and non-profit research institutes.
- Web sites of research funding organizations that supported the research for this article.
- The author's website.
- Non-profit online dissertation archives.
Terms of use

he copyright holder must also be indicated. For example, L.N. Gumilyov Eurasian National University.