International indexing
1. erih+
3. Central & Eastern European Academic Source (CEEAS)
4. Education Source Ultimate (EBSCO)
5. Crossref
6. MIAR
7. WorldCat
8. Bielefeld Academic Search Engine (BASE)
9. National Library of Ukraine named after VI Vernadsky
10. Google Scholar
11. OpenAIRE
12. Directory of Open Access scholarly Resources (ROAD)
13. The Directory of Research Journal Indexing (DRJI)
15. Neliti
16. CORE (COnnecting REpositories)
17. Scilit
18. Ulrich's Periodicals Directory
19. Korea Institute of Science and Technology Information (KISTI)
22. Dimensions
21. SJSU (California, United States) library
22. SLUB
23. China National Knowledge Infrastructure (CNKI)
