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Silva Balcanica 22(2): 73-79
doi:
10.3897/silvabalcanica.22.e74151
Received:
08 Sep 2021 | Approved:
20 Sep 2021 | Published:
20 Oct 2021
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Authors
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
Science Naturali ed Ambientali, Rome, Italy
Unaffiliated, Sofia, Bulgaria
University of Forestry, Sofia, Bulgaria
Georgi Georgiev 
- Corresponding author
- Corresponding author
Forest Research Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria
Academic editor
Forest Research Institute, 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.