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Journal of the Bulgarian Geographical Society 44: 21-24
https://doi.org/10.3897/jbgs.e66377 (09 Jul 2021)
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Journal of the Bulgarian Geographical Society 44: 21-24
doi: 10.3897/jbgs.e66377
Received: 23 Mar 2021 | Approved: 03 Jun 2021 | Published: 09 Jul 2021
This article is part of:
Journal of the Bulgarian Geographical Society 44
Authors
   
   
   
   
Borislav Grigorov - Corresponding author
Sofia University, Sofia, Bulgaria
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Nikolay Velev
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
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Assen Assenov
Sofia University, Sofia, Bulgaria
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Momchil Nazarov
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
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Mladen Gramatikov
FCG Povvik Ltd., Sofia, Bulgaria
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Beloslava Genova
University of Plovdiv, Plovdiv, Bulgaria
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Kiril Vassilev
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
https://www.researchgate.net/profile/Kiril_Vassilev
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Academic editor
Mariyana Nikolova
National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria
http://niggg.bas.bg
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Conflict of interest
The authors have declared that no competing interests exist.
Supporting agencies
This investigation was carried with the financial help of the national scientific programme “Young scientists and Postdoctoral students” for 2019, contract № 22-0078/ 22.04.2019 and the National Science Fund (Contract ДКОСТ 01/7/19.10.2018).
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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