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Tzanko Tzankov
South-West University „Neofit Rilski“ – Blagoevgrad,
Faculty of Mathematics and Natural Sciences, Department of Geography, Ecology and Environment ProtectionBlagoevgrad
Svetla Stankova
Konstantin Preslavski University of Shumen,
Faculty of Natural Sciences, Department of Geography and Regional Development
Rosen Iliev
South-West University „Neofit Rilski“ – Blagoevgrad,
Faculty of Mathematics and Natural Sciences, Department of Geography, Ecology and Environment ProtectionBlagoevgrad
Ilia Mitkov
South-West University „Neofit Rilski“ – Blagoevgrad,
Faculty of Mathematics and Natural Sciences, Department of Geography, Ecology and Environment ProtectionBlagoevgrad