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Journal of the Bulgarian Geographical Society 40: 3-9
doi: 10.3897/jbgs.2019.40.1
Published: 03 Apr 2019
This article is part of:
Journal of the Bulgarian Geographical Society 40
Authors
   
   
   
   
Emil Gachev
South-West University "Neofit Rilski", Blagoevgrad, Bulgaria
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Predrag Djurović
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Krasimir Stoyanov
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Galina Bezinskа
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Miroslav Ivanov
South-West University "Neofit Rilski", Blagoevgrad, Bulgaria
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Stefan Petrov
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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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