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Journal of the Bulgarian Geographical Society 44: 73-79
doi:
10.3897/jbgs.e77102
Received:
27 Oct 2021 | Approved:
18 Nov 2021 | Published:
25 Nov 2021
This article is part of:
Regional water security issues
Edited by Chad Staddon
This article is part of:
Authors
Hristo Popov
- Corresponding author
Sofia University "St. Kliment Ohridski", Sofia, Bulgaria
School of Economics, Pirot, Serbia
Sofia University "St. Kliment Ohridski", Sofia, Bulgaria
Academic editor
National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, 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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