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Journal of the Bulgarian Geographical Society 39: 25-28
doi: 10.3897/jbgs.2018.39.4
Published: 13 Nov 2018
This article is part of:
Journal of the Bulgarian Geographical Society 39
Authors
   
   
   
Alexandar Sarafov
Sofia University, Sofia, Bulgaria
https://leops.gea.uni-sofia.bg/blog/academic-profiles/%d0%b4%d0%be%d1%86-%d0%b4-%d1%80-%d0%b0%d0%bb%d0%b5%d0%ba%d1%81%d0%b0%d0%bd%d0%b4%d1%8a%d1%80-%d1%81%d0%b0%d1%80%d0%b0%d1%84%d0%be%d0%b2/
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Emilia Tcherkezova
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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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