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Journal of the Bulgarian Geographical Society 45: 19-30
doi:
10.3897/jbgs.e73687
Received:
30 Aug 2021 | Approved:
18 Nov 2021 | Published:
29 Dec 2021
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Authors

Stoyan Nedkov
- Corresponding author
National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria

Sofia University, Sofia, Bulgaria

National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria

Sofia University, Sofia, Bulgaria

National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Scienses, Sofia, Bulgaria

Sofia University, Sofia, Bulgaria

Forest Research Institute - Bulgarian Academy of Sciences, Sofia, Bulgaria

National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria
Academic editor

Sofia University "St. Kliment Ohridski", Sofia, Bulgaria
Conflict of interest
The authors have declared that no competing interests exist.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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