1. Index Medicus (IMSEAR)
  2. Global Index Medicus
  3. Index Copernicus
  4. Google Scholar
  5. International Committee of Medical Journal Editors(ICJME)
  6. Research Bible
  7. Scientific Indexing Services(SIS)
  9. Scientific Journal Impact Factor (SJIF)
  10. Advanced Science Index
  12. Gaudeamus
  13. Academic Keys
  14. International Scientific Indexing (ISI)
  15. Sribd
  16. Universal Impact Factor
  17. Impact Factor Services for International Journals (IFSIJ)
  18. International Institute of Organized Research (I2OR)
  19. PubsHub
  20. Scholar Article Impact Factor (SAIF)
  21. Eurasian Scientific Journal Index (ESJI)
  22. J-Gate
  23. Open Academic Journals Index(OAJI)
  24. CiteFactor
  25. Directory of abstract indexing for Journals(DAIJ)
  26. IIFS(International Impact Factor Services)
  27. Jour Informatics
  28. Sherpa Romeo
  29. Scholarly Open Access
  30. Ulrichs Web Global Serial Directory
  31. Cosmos
  33. Directory of Research Journal Indexing (DRJI)
  34. III Factor
  35. International Journal Impact Factor(IJIF)
  36. Science Library Index
  37. Scientific World Index
  38. International Innovative Journal Impact Factor (IIJIF)
  39. Scholarsteer
  40. General Impact factor
  41. Global Impact Factor
  42. Journal Quality Factor
  43. ROAD
  44. DocFoc
  45. Open Access Library
  46. Indian Journals Index
  47. Electronic Journals Library
  48. World Cat
  49. Budapest Open Access Initiative
  50. Research Impact factor
  51. DIIF
  52. JIFactor
  53. Research Junction
  54. Root Indexing
  55. Journal Factor
  56. Geneva foundation for medical education and research
Global Index Medicus Index Copernicus Google Scholar SAIF SJIF ISI client 2 Gaudeamus ISI ijcme client 2 client 2 client 3 client 5 client 2 client 2 client 4 IFSIJ IFSIJ ESJI J-Gate Oaji CiteFactor DAIJ IIFS JOUR Sherpa SOA Ulrich Cosmos POLSKA BIBLIOGRAFIA NAULOVA Directory of Research Journal Indexing (DRJI) III Factor International Journal Impact Factor(IJIF) Science Library Index Scientific World Index International Innovative Journal Impact Factor (IIJIF Scholarsteer General Impact factor Global Impact Factor Journal Quality Factor ROAD DocFoc Open Access Library Indian journals Index Electronic World Cat BOAI RIF DIIF JIF Research Junction  Root Indexing  Journal Factor  Geneva foundation for medical education and research