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  1. Open Research Europe

    Additional searchable ISSN (electronic): 2732-5121

    F1000 Research Ltd

    Scopus rating (2023): CiteScore 1.5 SJR 0.28 SNIP 0.555

    Indexed in DOAJ

    Journal

  2. Open Review of Educational Research

    Additional searchable ISSN (electronic): 2326-5507

    Taylor and Francis Ltd.

    Scopus rating (2020): CiteScore 2.6 SJR 0.453 SNIP 1.743

    Journal

  3. Open Systems and Information Dynamics

    ISSNs: 1230-1612

    Additional searchable ISSN (electronic): 1573-1324

    World Scientific Publishing Co. Pte Ltd

    Scopus rating (2023): CiteScore 1.4 SJR 0.337 SNIP 0.503

    Journal

  4. Opera Medica et Physiologica

    ISSNs: 2500-2287

    Additional searchable ISSN (electronic): 2500-2295

    Lobachevsky State University of Nizhny Novgorod

    Scopus rating (2023): CiteScore 0.4 SJR 0.125 SNIP 0.116

    Journal

  5. Operations Research Letters

    ISSNs: 0167-6377

    Elsevier B.V.

    Scopus rating (2023): CiteScore 2.1 SJR 0.449 SNIP 0.728

    Journal

  6. Operations Research Perspectives

    Additional searchable ISSN (electronic): 2214-7160

    Elsevier Ltd

    Scopus rating (2023): CiteScore 6.4 SJR 0.809 SNIP 1.422

    Indexed in DOAJ

    Journal

  7. Operative Neurosurgery

    ISSNs: 2332-4252

    Additional searchable ISSN (electronic): 2332-4260

    Lippincott Williams and Wilkins

    Scopus rating (2023): CiteScore 3.1 SJR 0.577 SNIP 1.02

    Journal

  8. Ophiussa

    ISSNs: 1645-653X

    Additional searchable ISSN (electronic): 2184-173X

    University of Lisbon Centre for Archaeology

    Journal

  9. Ophthalmic and Physiological Optics

    ISSNs: 0275-5408, 0007-1218

    Additional searchable ISSN (electronic): 1475-1313

    Wiley-Blackwell Publishing Ltd.

    Scopus rating (2023): CiteScore 5.1 SJR 1.162 SNIP 1.464

    Journal

  10. Ophthalmic Epidemiology

    ISSNs: 0928-6586

    Additional searchable ISSN (electronic): 1744-5086

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 3.7 SJR 0.981 SNIP 1.048

    Journal

  11. Ophthalmic Genetics

    ISSNs: 1381-6810, 0167-6784

    Additional searchable ISSN (electronic): 1744-5094

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 2.4 SJR 0.509 SNIP 0.61

    Journal

  12. Ophthalmic Plastic and Reconstructive Surgery

    ISSNs: 0740-9303

    Additional searchable ISSN (electronic): 1537-2677

    Lippincott Williams and Wilkins Ltd.

    Scopus rating (2023): CiteScore 2.5 SJR 0.472 SNIP 0.918

    Journal

  13. Ophthalmic Surgery Lasers and Imaging Retina

    ISSNs: 2325-8160, 1542-8877, 1938-2375, 1082-3069, 0022-023X

    Additional searchable ISSN (electronic): 2325-8179

    Slack Incorporated

    Scopus rating (2023): CiteScore 1.8 SJR 0.546 SNIP 0.587

    Journal

  14. Ophthalmology and Therapy

    ISSNs: 2193-8245

    Additional searchable ISSN (electronic): 2193-6528

    Springer London

    Scopus rating (2023): CiteScore 4.2 SJR 1.158 SNIP 1.28

    Indexed in DOAJ

    Journal

  15. Ophthalmology Journal

    ISSNs: 1998-7102

    Additional searchable ISSN (electronic): 2412-5423

    Eco-Vector LLC

    Scopus rating (2023): CiteScore 0.4 SJR 0.14 SNIP 0.252

    Journal

  16. Optics and Lasers in Engineering

    ISSNs: 0143-8166

    Additional searchable ISSN (electronic): 1873-0302

    Elsevier Ltd, Netherlands

    Scopus rating (2023): CiteScore 8.9 SJR 1.009 SNIP 1.842

    Journal

  17. Optics and Laser Technology

    ISSNs: 0030-3992

    Additional searchable ISSN (electronic): 1879-2545

    Elsevier Ltd, United Kingdom

    Scopus rating (2023): CiteScore 8.5 SJR 0.878 SNIP 1.524

    Journal

  18. Optics Letters

    ISSNs: 0146-9592

    Additional searchable ISSN (electronic): 1539-4794

    Optica Publishing Group

    Scopus rating (2023): CiteScore 6.6 SJR 1.04 SNIP 1.192

    Journal

  19. Optimal Control Applications and Methods

    ISSNs: 0143-2087

    Additional searchable ISSN (electronic): 1099-1514

    John Wiley & Sons Ltd.

    Scopus rating (2023): CiteScore 3.9 SJR 0.553 SNIP 0.93

    Journal

  20. Optimization

    ISSNs: 0233-1934

    Additional searchable ISSN (electronic): 1029-4945

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 4.5 SJR 0.699 SNIP 1.262

    Journal

  21. Optimization Letters

    ISSNs: 1862-4472

    Additional searchable ISSN (electronic): 1862-4480

    Springer

    Scopus rating (2023): CiteScore 3.4 SJR 0.723 SNIP 1.197

    Journal

  22. Optimization Methods and Software

    ISSNs: 1055-6788

    Additional searchable ISSN (electronic): 1029-4937

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 4.5 SJR 1.001 SNIP 1.397

    Journal

  23. Optoelectronics Letters

    ISSNs: 1673-1905

    Additional searchable ISSN (electronic): 1993-5013

    Springer

    Scopus rating (2023): CiteScore 1.5 SJR 0.233 SNIP 0.395

    Journal

  24. Optometry

    ISSNs: 1529-1839

    Additional searchable ISSN (electronic): 1558-1527

    Elsevier Inc.

    Journal

  25. Optometry and Vision Science

    ISSNs: 1040-5488, 0093-7002, 0002-9408, 2330-9474

    Additional searchable ISSN (electronic): 1538-9235

    Lippincott Williams and Wilkins Ltd.

    Scopus rating (2023): CiteScore 2.8 SJR 0.585 SNIP 0.777

    Journal

  26. Opuscula Philolichenum

    ISSNs: 1941-7519

    Additional searchable ISSN (electronic): 1941-7527

    J. Lendemer

    Scopus rating (2023): CiteScore 2.4 SJR 0.54 SNIP 1.106

    Journal

  27. Oral History Review

    ISSNs: 0094-0798

    Additional searchable ISSN (electronic): 1533-8592

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 1.2 SJR 0.138 SNIP 2.394

    Journal

  28. Oralia

    ISSNs: 1575-1430

    Arco Libros S.L.

    Scopus rating (2023): CiteScore 0.8 SJR 0.236 SNIP 1.96

    Journal

  29. Oral Oncology

    ISSNs: 1368-8375

    Additional searchable ISSN (electronic): 1879-0593

    Elsevier Ltd

    Scopus rating (2023): CiteScore 8.7 SJR 1.257 SNIP 1.379

    Journal

  30. Oral Oncology Reports

    Additional searchable ISSN (electronic): 2772-9060

    Elsevier Ltd

    Indexed in DOAJ

    Journal

  31. Oral Surgery

    ISSNs: 1752-2471

    Additional searchable ISSN (electronic): 1752-248X

    Wiley-Blackwell Publishing Ltd.

    Scopus rating (2023): CiteScore 0.9 SJR 0.205 SNIP 0.362

    Journal

  32. Orbis Litterarum

    ISSNs: 0105-7510

    Additional searchable ISSN (electronic): 1600-0730

    Wiley-Blackwell Publishing Ltd.

    Scopus rating (2023): CiteScore 0.4 SJR 0.128 SNIP 0.691

    Journal

  33. Orbit

    ISSNs: 0167-6830

    Additional searchable ISSN (electronic): 1744-5108

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 2.4 SJR 0.389 SNIP 0.939

    Journal

  34. Orbit (Cambridge)

    Additional searchable ISSN (electronic): 2398-6786

    Open Library of Humanities

    Scopus rating (2023): CiteScore 0.2 SJR 0.102 SNIP 0

    Indexed in DOAJ

    Journal

  35. ORDO – Jahrbuch für die Ordnung von Wirtschaft und Gesellschaft

    ISSNs: 0048-2129

    Lucius & Lucius, Germany

    Journal

  36. Organic Farming

    Additional searchable ISSN (electronic): 2297-6485

    Acadlore Publishing Services Limited

    Scopus rating (2023): CiteScore 1.5 SJR 0.137 SNIP 0.421

    Indexed in DOAJ

    Journal

  37. Organic Geochemistry

    ISSNs: 0146-6380

    Elsevier Ltd, Netherlands

    Scopus rating (2023): CiteScore 5.5 SJR 0.919 SNIP 0.862

    Journal

  38. Organic Letters

    ISSNs: 1523-7060

    Additional searchable ISSN (electronic): 1523-7052

    American Chemical Society, United States

    Scopus rating (2023): CiteScore 9.3 SJR 1.245 SNIP 1.02

    Journal

  39. Organic Preparations and Procedures International

    ISSNs: 0030-4948, 0885-6672

    Additional searchable ISSN (electronic): 1945-5453

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 2.6 SJR 0.239 SNIP 0.457

    Journal

  40. Organization Management Journal

    ISSNs: 1541-6518

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 2.6 SJR 0.352 SNIP 0.607

    Indexed in DOAJ

    Journal

  41. Organization, Technology and Management in Construction

    Additional searchable ISSN (electronic): 1847-6228

    De Gruyter Open Ltd.

    Scopus rating (2023): CiteScore 3.1 SJR 0.416 SNIP 0.907

    Indexed in DOAJ

    Journal

  42. Organogenesis

    ISSNs: 1547-6278

    Additional searchable ISSN (electronic): 1555-8592

    Landes Bioscience

    Scopus rating (2023): CiteScore 4.1 SJR 0.457 SNIP 0.754

    Indexed in DOAJ

    Journal

  43. Oriental Insects

    ISSNs: 0030-5316

    Additional searchable ISSN (electronic): 2157-8745

    Taylor and Francis Ltd.

    Scopus rating (2023): CiteScore 1.6 SJR 0.244 SNIP 0.607

    Journal

  44. Orientation Scolaire et Professionnelle

    ISSNs: 0249-6739

    Additional searchable ISSN (electronic): 2104-3795

    Inetop-Cnam , France

    Scopus rating (2023): CiteScore 0.4 SJR 0.145 SNIP 0.171

    Journal

  45. Orientierungen zur Wirtschafts- und Gesellschaftspolitik

    ISSNs: 0724-5246

    Additional searchable ISSN (electronic): 2366-021X

    Ludwig Erhard Stiftung, Germany

    Journal

  46. Origins of Life and Evolution of Biospheres

    ISSNs: 0169-6149, 0302-1688, 0038-6286

    Additional searchable ISSN (electronic): 1573-0875

    Springer Science and Business Media B.V.

    Scopus rating (2023): CiteScore 3.2 SJR 0.368 SNIP 0.502

    Journal

  47. ORL

    ISSNs: 0301-1569, 0032-6305

    Additional searchable ISSN (electronic): 1423-0275

    S. Karger AG

    Scopus rating (2023): CiteScore 2.8 SJR 0.415 SNIP 0.757

    Journal

  48. Orphanet Journal of Rare Diseases

    ISSNs: 1750-1172

    BioMed Central Ltd.

    Indexed in DOAJ

    Journal

  49. Orthodontics and Craniofacial Research

    ISSNs: 1601-6335, 1397-5927, 1600-0544

    Additional searchable ISSN (electronic): 1601-6343

    Wiley-Blackwell Publishing Ltd.

    Scopus rating (2023): CiteScore 5.3 SJR 0.967 SNIP 1.68

    Journal

  50. Orthodontic Waves

    ISSNs: 1344-0241

    Additional searchable ISSN (electronic): 1878-1837

    Taylor and Francis Ltd.

    Journal