1. ИСТИНА 

2. ResearchGate 

3. ISSN 

4. Archive.org

5. Calameo 

6. Citefactor

7. ErihPlus 

8. e-Library.ru

9. DRJI 

10. ResearchBib 

11. Izdanii.ru,

12. Google Scholar

13. Electronic Journals Library Universitätsbibliothek Duisburg-Essen

14. Iidealonline

15. BASE Bielefeld Academic Search Engine,

16. EuroPub