1. Faculty of Sociology, Adam Mickiewicz University, Poznań, Poland
2. Faculty of Mathematics and Computer Science, Adam Mickiewicz University, Poznań, Poland
3. Faculty of Geographic and Geological Sciences, Adam Mickiewicz University, Poznań, Poland
4. Department of Geography and Anthropology, Louisiana State University, Baton Rouge, USA
5. Institute of Spatial Management and Socio-Economic Geography, University of Szczecin, Szczecin, Poland