Bulgaria
Research
Date range: 1 June 2022 - 31 May 2023
Subject/journal group: All
The table to the right includes counts of all research outputs for Bulgaria published between 1 June 2022 - 31 May 2023 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.
Count | Share |
---|---|
106 | 12.69 |
Outputs by subject (Share)
Subject | Count | Share |
---|---|---|
Biological sciences | 13 | 0.71 |
Chemistry | 15 | 3.77 |
Earth & environmental sciences | 6 | 0.22 |
Health sciences | 18 | 0.72 |
Physical sciences | 61 | 7.53 |
Share output for the past 5 years
2018 | 2019 | 2020 | 2021 | 2022* |
---|---|---|---|---|
13.62 | 15.24 | 9.74 | 13.89 | 13.31 |
Compare Bulgaria with other countries/territories
*Note: 2022 data contains Share for article affiliations from newly added health sciences journals.
Collaboration
View the connected world of international research collaboration. Visualize collaborations by subject or region.
Date range: 1 June 2022 - 31 May 2023
Collaboration by percentage of Share
Hover over the graph to view collaboration by percentage of Share.
Country | Share (%) |
---|---|
USA | 28.45 |
Germany | 20.75 |
Italy | 11.58 |
China | 7.27 |
UK | 6.92 |
Spain | 5.87 |
Russia | 5.67 |
Switzerland | 5.45 |
France | 4.71 |
Belgium | 3.35 |
Top 10 collaborators with Bulgaria by Share
-
Bulgaria and United States of America (USA)
(22.67)
-
Bulgaria and Germany
(16.54)
-
Bulgaria and Italy
(9.23)
-
Bulgaria and China
(5.79)
-
Bulgaria and United Kingdom (UK)
(5.52)
-
Bulgaria and Spain
(4.67)
-
Bulgaria and Russia
(4.52)
-
Bulgaria and Switzerland
(4.34)
-
Bulgaria and France
(3.75)
-
Bulgaria and Belgium
(2.67)
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) | 61 | 6.03 |
2. | Sofia University St. Kliment Ohridski | 57 | 5.42 |
3. | Medical University of Sofia | 7 | 0.30 |
4. | Technical University of Sofia | 3 | 0.26 |
5. | Center of Plant Systems Biology and Biotechnology (CPSBB) | 2 | 0.20 |
6. | St. Ivan Rilski University Hospital | 1 | 0.14 |
7. | Medical University of Plovdiv | 2 | 0.07 |
8. | National Center of Infectious and Parasitic Diseases (NCIPD) | 2 | 0.07 |
9. | National Cardiology Hospital - Sofia | 2 | 0.06 |
10. | National Historical Museum | 1 | 0.04 |

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