Bulgaria

Research

Date range: 1 April 2021 - 31 March 2022

Subject/journal group: All

The table to the right includes counts of all research outputs for Bulgaria published between 1 April 2021 - 31 March 2022 which are tracked by the Nature Index.

Hover over the donut graph to view the Share for each subject. Below, the same research outputs are grouped by subject. Click on the subject to drill-down into a list of articles organized by journal, and then by title.

Note: Articles may be assigned to more than one subject area.

Article Count and Share for Bulgaria
Count Share
156 13.53

Outputs by subject (Share)

Outputs by subject
Subject Count Share
121 9.56
4 0.42
21 1.12
11 2.65

Share output for the past 5 years

Share per year
2016 2017 2018 2019 2020
9.67 7.08 13.62 15.24 9.74

Compare Bulgaria with other countries/territories

Collaboration

View the connected world of international research collaboration. Visualize collaborations by subject or region.

Collaborations between countries

Date range: 1 April 2021 - 31 March 2022

Collaboration by percentage of Share

Hover over the graph to view collaboration by percentage of Share.

Collaboration by percentage of Share
Country Share (%)
USA 25.32
Germany 18.87
Italy 9.92
France 8.89
UK 7.75
Russia 7.62
Switzerland 6.31
China 5.62
Belgium 5.05
Spain 4.65

Top 10 collaborators with Bulgaria by Share

  1. Bulgaria and United States of America (USA) (31.08)
    Bulgaria2.50
    United States of America (USA)28.58
  2. Bulgaria and Germany (23.16)
    Bulgaria3.25
    Germany19.91
  3. Bulgaria and Italy (12.18)
    Bulgaria1.18
    Italy10.99
  4. Bulgaria and France (10.91)
    Bulgaria2.72
    France8.20
  5. Bulgaria and United Kingdom (UK) (9.52)
    Bulgaria1.22
    United Kingdom (UK)8.30
  6. Bulgaria and Russia (9.35)
    Bulgaria0.97
    Russia8.38
  7. Bulgaria and Switzerland (7.75)
    Bulgaria0.83
    Switzerland6.92
  8. Bulgaria and China (6.90)
    Bulgaria1.63
    China5.27
  9. Bulgaria and Belgium (6.19)
    Bulgaria1.90
    Belgium4.29
  10. Bulgaria and Spain (5.71)
    Bulgaria1.47
    Spain4.24

Collaboration is determined by the combined fractional count (Share) of Bulgaria and the collaborating country.

Top 10 institutions from Bulgaria by Share

Institution Count Share
1. Bulgarian Academy of Sciences (BAS) 117 8.85
2. Sofia University St. Kliment Ohridski 95 5.74
3. Center of Plant Systems Biology and Biotechnology (CPSBB) 2 0.22
4. Institute of Fishery Resources 1 0.19
5. New Bulgarian University (NBU) 2 0.13
6. Medical University of Varna 1 0.13
7. Medical University of Plovdiv 4 0.10
8. Maritsa Vegetable Crops Research Institute (MVCRI) 3 0.08
9. Medical University Pleven 1 0.06
10. Sofiyska Voda AD 1 0.06

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