1. Scopus 2. Web of Science 3. Google Scholar 4. ORCID 5. ResearchGate 6. Academia 7. Springer 8. Routledge Author 9. Fulbright Scholar 10. Amazon Books 11. Apple Books 12. Google Books 13. Grow Kudos 14. Mendeley 15. Good Reads 16. Semantic Scholar 17. ETIS 18. ACM 19. DBLP 20. PubMed
