1. Sinta

2. Dimensions

3. Google Scholar

4. DOAJ

5. ROAD

6. Crossref

7. Base

8. ResearchBib

9. Worldcat

10. EuroPub

11. Semantic Scholar

12. Scilit

13. Garba Rujukan Digital (Garuda)

14. Publons 

15. Moraref

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