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Silva Balcanica 23(1): 57-65
doi:
10.3897/silvabalcanica.23.e89314
Received:
20 Jun 2022 | Approved:
17 Jul 2022 | Published:
10 Aug 2022
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Authors
Sonja Bencheva 
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University of Forestry, Sofia, Bulgaria
University of Forestry, 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.