There are 20,453 titles available from DOAJ Directory of Open Access Journals

  1. Theoretical and Applied Economics (ISSN: 1841-8678,EISSN: 1844-0029)
  2. Theoretical and Applied Mechanics (ISSN: 1450-5584,EISSN: 0353-8249)
  3. Theoretical and Applied Mechanics Letters (ISSN: 2095-0349,EISSN: 2589-0336)
  4. Theoretical and Applied Veterinary Medicine (ISSN: 2663-1156,EISSN: 2663-1164)
  5. Theoretical Economics (ISSN: 1933-6837,EISSN: 1555-7561)
  6. Theoretical Roman Archaeology Journal (EISSN: 2515-2289)
  7. TheoretiCS (EISSN: 2751-4838)
  8. TheoRhēma (ISSN: 1842-0613,EISSN: 2784-2665)
  9. Theoria (ISSN: 0040-5817,EISSN: 1558-5816)
  10. Theoria (ISSN: 0495-4548,EISSN: 2171-679X)
  11. Theoria: педагогика, экономика, право (EISSN: 2712-9926)
  12. Theory and Applications of Graphs (ISSN: 2470-9859)
  13. Theory and practice in child development (Online) (EISSN: 2791-9943)
  14. Theory and Practice of Second Language Acquisition (ISSN: 2450-5455,EISSN: 2451-2125)
  15. Theory Now (EISSN: 2605-2822)
  16. Theory, Methodology, Practice (EISSN: 1589-3413)
  17. Theoría (ISSN: 1665-6415)
  18. Theranostics (ISSN: 1838-7640)
  19. Therapeutic Advances in Cardiovascular Disease (ISSN: 1753-9447,EISSN: 1753-9455)
  20. Therapeutic Advances in Chronic Disease (ISSN: 2040-6223,EISSN: 2040-6231)
  21. Therapeutic Advances in Drug Safety (ISSN: 2042-0986,EISSN: 2042-0994)
  22. Therapeutic Advances in Endocrinology and Metabolism (ISSN: 2042-0188,EISSN: 2042-0196)
  23. Therapeutic Advances in Gastroenterology (ISSN: 1756-283X,EISSN: 1756-2848)
  24. Therapeutic Advances in Gastrointestinal Endoscopy (EISSN: 2631-7745)
  25. Therapeutic Advances in Hematology (ISSN: 2040-6207,EISSN: 2040-6215)
  26. Therapeutic Advances in Infectious Disease (ISSN: 2049-9361,EISSN: 2049-937X)
  27. Therapeutic Advances in Medical Oncology (ISSN: 1758-8340,EISSN: 1758-8359)
  28. Therapeutic Advances in Musculoskeletal Disease (ISSN: 1759-720X,EISSN: 1759-7218)
  29. Therapeutic Advances in Neurological Disorders (ISSN: 1756-2856,EISSN: 1756-2864)
  30. Therapeutic Advances in Ophthalmology (ISSN: 2515-8414)
  31. Therapeutic Advances in Psychopharmacology (ISSN: 2045-1253,EISSN: 2045-1261)
  32. Therapeutic Advances in Rare Disease (ISSN: 2633-0040)
  33. Therapeutic Advances in Reproductive Health (EISSN: 2633-4941)
  34. Therapeutic Advances in Respiratory Disease (ISSN: 1753-4658,EISSN: 1753-4666)
  35. Therapeutic Advances in Urology (ISSN: 1756-2872,EISSN: 1756-2880)
  36. Therapeutic Advances in Vaccines and Immunotherapy (ISSN: 2515-1355,EISSN: 2515-1363)
  37. Therapeutics and Clinical Risk Management (ISSN: 1176-6336,EISSN: 1178-203X)
  38. Theriogenology Wild (EISSN: 2773-093X)
  39. Theriologia Ukrainica (ISSN: 2616-7379,EISSN: 2617-1120)
  40. Thermo (EISSN: 2673-7264)
  41. Thersites. Journal for Transcultural Presences & Diachronic Identities from Antiquity to Date (ISSN: 2364-7612)
  42. Therya (EISSN: 2007-3364)
  43. Thesis (ISSN: 1848-4298,EISSN: 2623-8381)
  44. Thinker (ISSN: 2075-2458,EISSN: 2616-907X)
  45. Thoracic & Cardiovascular Surgeon Reports (ISSN: 2194-7643,EISSN: 2194-7635)
  46. Thoracic Cancer (ISSN: 1759-7706,EISSN: 1759-7714)
  47. Thoracic research and practice (Online) (EISSN: 2979-9139)
  48. Three Seas Economic Journal (ISSN: 2661-5150,EISSN: 2661-5290)
  49. Thrombosis Journal (EISSN: 1477-9560)
  50. Thrombosis Update (EISSN: 2666-5727)