Open Access statistics for Bulgaria, covering academic research published from 2000 to 2025. Read More.
Open Access Percentage
57%
Total
Publications
161K
Total Open
Publications
92K
Total
Citations
2.7M
Open Access
Percentage
57%
Total
Publications
161K
Total Open
Publications
92K
Total
Citations
2.7M
Breakdown
Publisher Open
25%
Both
25%
Other Platform Open
7%
Closed
43%
Percentage of Open Access over time
Publisher Open
Both
Other Platform Open
Closed
Volume of Open Access over time
Open
Closed
Publisher Open
OA Journal 44%
35K
Hybrid 26%
21K
No Guarantees 30%
24K
Other Platform Open
Institution 65%
34K
Other Internet 34%
18K
Domain 25%
13K
Preprint 11%
5.8K
Public 5%
2.4K
Other Platform Locations
Name | Platform Type | Publications |
|---|---|---|
doaj.org OAI-PMH Repository | Institution | 21K |
PubMed Central | Domain | 13K |
DOI | Other Internet | 13K |
Unknown Repository | Other Internet | 11K |
arXiv | Preprint | 4K |
Office of Scientific and Technical Information | Institution | 2.8K |
LA Referencia | Institution | 1.7K |
Le Centre pour la Communication Scientifique Directe - HAL - Diderot | Institution | 1.3K |
Zenodo | Public | 1.3K |
ETH Zurich | Institution | 1.1K |
1 / 20