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Government institution · Sofia · Bulgaria

Bulgarian Academy of Sciences

In research, Bulgarian Academy of Sciences stands highest in Physical Sciences (#1,402 of 12,888 worldwide), Mathematics (#257 of 1,053 worldwide) and Life Sciences (#2,127 of 7,800 worldwide), 2022–2025. Relative to its size it is most specialised in Classics, Numerical Analysis and Geochemistry and Petrology — Classics is 10.0× its share of world research.

bas.bgROR OpenAlex
World rank, 2022–2025
#1,986
of 28,054 · #1,506 all time
Rank in Bulgaria
#1
of 92
Research works
26k
▲ 53% vs 2013–17
Citations
330k
12.6 per fractional work
Top-10% rate
10.2%
record average 16.5%
Open access
30%
world 28%

What is Bulgarian Academy of Sciences known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #1,402 of 12,888 8.2%1,967 #1170
MathematicsField #257 of 1,053 13.9%159 #572
Life SciencesDomain #2,127 of 7,800 13.3%531 #2622
Social SciencesDomain #3,026 of 10,521 12.5%593 #3882
Social SciencesField #2,160 of 6,365 12.5%239 #3302
EngineeringField #2,256 of 6,636 6.3%528 #1776
MedicineField #3,631 of 10,443 14.8%204 #6010
Biochemistry, Genetics and Molecular BiologyField #1,385 of 3,579 11.7%188 #1930
Health SciencesDomain #4,694 of 11,982 13.7%255 #7462
Computer ScienceField #2,094 of 4,667 8.3%304 #1943

Each strip is that field’s whole ranked pool, with the notch where Bulgarian Academy of Sciences sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022–2025. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Physical Sciences#1,170 #1,402
  2. Mathematics#572 #257
  3. Life Sciences#2,622 #2,127
  4. Social Sciences#3,882 #3,026
  5. Social Sciences#3,302 #2,160
  6. Engineering#1,776 #2,256
  7. Medicine#6,010 #3,631
  8. Biochemistry, Genetics and Molecular Biology#1,930 #1,385
  9. Health Sciences#7,462 #4,694
  10. Computer Science#1,943 #2,094
all time2022–2025, better2022–2025, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

What does Bulgarian Academy of Sciences specialise in?

Where its research is concentrated relative to its size: Classics takes 10.0× the share of its output that it takes of world research.

  1. ClassicsSubfield · 20.0 works10×
  2. Numerical AnalysisSubfield · 25.8 works9.0×
  3. Geochemistry and PetrologySubfield · 26.2 works7.7×
  4. ArcheologySubfield · 54.8 works5.4×
  5. OceanographySubfield · 48.7 works5.2×
  6. Mathematical PhysicsSubfield · 25.3 works4.8×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 1.63× its world share, 260 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.06× its world share, 188 worksBiochemistry, Geneti…Immunology and Microbiology: 0.75× its world share, 25 worksImmunology and Micro…Neuroscience: 0.83× its world share, 45 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.07× its world share, 13 worksPharmacology, Toxico…Chemical Engineering: 1.69× its world share, 20 worksChemical EngineeringChemistry: 1.82× its world share, 96 worksChemistryComputer Science: 1.17× its world share, 304 worksComputer ScienceEarth and Planetary Sciences: 3.96× its world share, 208 worksEarth and Planetary …Energy: 1.12× its world share, 34 worksEnergyEngineering: 1.05× its world share, 528 worksEngineeringEnvironmental Science: 1.34× its world share, 222 worksEnvironmental ScienceMaterials Science: 1.82× its world share, 212 worksMaterials ScienceMathematics: 4.04× its world share, 159 worksMathematicsPhysics and Astronomy: 2.48× its world share, 184 worksPhysics and AstronomyDentistry: 0.49× its world share, 8 worksDentistryHealth Professions: 0.29× its world share, 25 worksHealth ProfessionsMedicine: 0.32× its world share, 204 worksMedicineNursing: 0.76× its world share, 12 worksNursingVeterinary: 1.11× its world share, 5 worksVeterinaryArts and Humanities: 1.69× its world share, 164 worksArts and HumanitiesBusiness, Management and Accounting: 0.37× its world share, 40 worksBusiness, Management…Decision Sciences: 1.28× its world share, 41 worksDecision SciencesEconomics, Econometrics and Finance: 0.69× its world share, 50 worksEconomics, Econometr…Psychology: 0.58× its world share, 59 worksPsychologySocial Sciences: 0.57× its world share, 239 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Mathematics, 4.0×. Every wedge is a field page.

Who are the top researchers at Bulgarian Academy of Sciences?

Ranked on the composite score, Nikolay Tzvetkov, Stanislav V. Vassilev and Milen I. Georgiev lead among researchers whose main affiliation is Bulgarian Academy of Sciences.

  1. 1 Nikolay Tzvetkov Bulgaria · #16,224 worldwide 776 citations · 50 works
  2. 2 Stanislav V. Vassilev Bulgaria · #28,932 worldwide 516 citations · 47 works
  3. 3 Milen I. Georgiev Bulgaria · #39,433 worldwide 819 citations · 31 works
  4. 4 V. Sládeček Bulgaria · #45,185 worldwide 148 citations · 49 works
  5. 5 Konstantin Hadjiivanov Bulgaria · #45,501 worldwide 860 citations · 37 works
  6. 6 Liudmil Antonov Bulgaria · #56,694 worldwide 379 citations · 52 works
  7. 7 Dimo Kashchiev Bulgaria · #73,685 worldwide 302 citations · 41 works
  8. 8 Kiril Vassilev Bulgaria · #94,226 worldwide 441 citations · 23 works
  9. 9 Тодор Тодоров Bulgaria · #101,584 worldwide 190 citations · 46 works
  10. 10 Krassimir Atanassov Bulgaria · #111,328 worldwide 391 citations · 138 works
All ranked researchers at Bulgarian Academy of Sciences

Which keywords describe research at Bulgarian Academy of Sciences?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Climate Change, Mediterranean, Holocene, Sea Level, Invasive Species, Black Sea, Sedimentation and Caspian Sea.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Climate Change152▲ 1.68×88 topics
  2. Machine Learning116◆ 1.06×80 topics
  3. Deep Learning79▼ 0.69×73 topics
  4. Remote Sensing77▲ 1.87×33 topics
  5. Nanoparticles70▲ 1.67×41 topics
  6. Oxidative Stress68▲ 1.23×57 topics
  7. Biodiversity62▲ 2.5×29 topics
  8. Biomedical Applications62▲ 1.55×35 topics
  9. Invasive Species59▲ 4.1×21 topics
  10. Mediterranean58▲ 19×5 topics
  11. Nanomaterials56▲ 1.59×19 topics
  12. Antioxidant53▲ 2.3×47 topics
  13. Mechanical Properties52▲ 1.59×35 topics
  14. Holocene50▲ 13×3 topics
  15. Nanocomposites48▲ 1.78×21 topics
  16. Sea Level46▲ 14×2 topics
  17. Antioxidant Activity42▲ 1.96×30 topics
  18. Black Sea41▲ 31×2 topics
  19. Sedimentation41▲ 22×2 topics
  20. Caspian Sea40▲ 40×1 topic
  21. paleoceanography40▲ 40×1 topic
  22. Cyber-Physical Systems40▲ 4.5×8 topics
  23. Biogeography37▲ 4.3×20 topics
  24. Cultural Exchange36▲ 8.1×5 topics
  25. Nonlinear Equations34▲ 7.9×6 topics
  26. Synthesis33▲ 2.7×31 topics
  27. Raman Spectroscopy29▲ 4.5×6 topics
  28. Genetic Algorithm28▲ 6.0×8 topics
  29. Phylogeny27▲ 5.3×17 topics
  30. Bronze Age24▲ 17×3 topics
  31. Taxonomy24▲ 5.6×13 topics
  32. Thermodynamic Modeling23▲ 6.0×4 topics
  33. Intelligent Agent22▲ 283×1 topic
  34. InterCriteria Analysis22▲ 283×1 topic
  35. Religious Identity21▲ 10×2 topics
  36. Eastern Europe20▲ 11×3 topics
  37. Byzantium20▲ 30×1 topic
  38. Eastern Mediterranean20▲ 30×1 topic
  39. Nonlinear Schrödinger Equation19▲ 10×2 topics
  40. Geochemistry19▲ 9.6×4 topics

Which research topics does Bulgarian Academy of Sciences publish most on?

By volume in 2022–2025: Marine and environmental studies, Intuitionistic Fuzzy Systems Applications, Byzantine Studies and History and Geological and Geochemical Analysis.

Marine and environmental…40Marine and environmental studies: 40 fractional worksIntuitionistic Fuzzy Systems Applications: 22 fractional worksByzantine Studies and Hi…20Byzantine Studies and History: 20 fractional worksGeological and Geochemic…18Geological and Geochemical Analysis: 18 fractional worksGeochemistry and Geologic Mapping: 17 fractional worksBalkans: History, Politics, Society: 14 fractional worksNonlinear Waves and Soli…14Nonlinear Waves and Solitons: 14 fractional worksAncient and Medieval Arc…13Ancient and Medieval Archaeology Studies: 13 fractional worksMulti-Criteria Decision …12Multi-Criteria Decision Making: 12 fractional worksLinguistics, Language Di…12Linguistics, Language Diversity, and Identity: 12 fractional works
OceanographyArtificial IntelligenceClassicsGeophysics5 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Marine and environmental studies Oceanography 40 works
  2. 2 Intuitionistic Fuzzy Systems Applications Artificial Intelligence 22 works
  3. 3 Byzantine Studies and History Classics 20 works
  4. 4 Geological and Geochemical Analysis Geophysics 18 works
  5. 5 Geochemistry and Geologic Mapping Artificial Intelligence 17 works
  6. 6 Balkans: History, Politics, Society Cultural Studies 14 works
  7. 7 Nonlinear Waves and Solitons Statistical and Nonlinear Physics 14 works
  8. 8 Ancient and Medieval Archaeology Studies Archeology 13 works
  9. 9 Multi-Criteria Decision Making Management Science and Operations Research 12 works
  10. 10 Linguistics, Language Diversity, and Identity Language and Linguistics 12 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available30.0%not open70.0%

World: 28% of research is openly available.

with international co-authors24.1%domestic only75.9%

World: 19% is written across borders.

How has Bulgarian Academy of Sciences's research output changed?

Output in 2018–2022 was 53% higher than in 2013–2017.

1990200020102020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Other research institutions in Sofia

All research institutions in Sofia

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.