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Journal of the Bulgarian Geographical Society 44: 39-47
doi: 10.3897/jbgs.e68982
Received: 24 May 2021 | Approved: 06 Aug 2021 | Published: 27 Aug 2021
This article is part of:
Journal of the Bulgarian Geographical Society 44
Author
   
   
   
   
Emil Gachev - Corresponding author
South-West University "Neofit Rilski", Blagoevgrad, Bulgaria
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Academic editor
Alexander Gikov
Space Research and Technology Institute - Bulgarian Academy of Sciences, Sofia, Bulgaria
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Conflict of interest
The author has 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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