Indexing
2. Index Copernicus Journals Master List
4. Central & Eastern European Academic Source (CEEAS)
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. JournalTOCs
13. EuroPub
18. CORE (COnnecting REpositories)
19. Neliti
20. Scilit
21. Ulrich's Periodicals Directory
22. ResearchGate
23. Lens
24. Korea Open Access Platform for Researchers (KOAR)
25. Paperity
26. Wizdom.ai
27. Sobiad
28. Dimensions
29. SJSU (California, United States) library
30. Electronic Journals Index, USA
31. Сobiss
32. TIB
33. SLUB
34. DeepDyve