Authors
Institute of Social and Economic Geography and Spatial Management, University of Silesia in Katowice, Sosnowiec, Poland
Institute of Social and Economic Geography and Spatial Management, University of Silesia in Katowice, Sosnowiec, Poland
© 2021 Valentin Mihaylov, Sławomir Sitek, published by Faculty of Geography and Regional Studies, University of Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.