1. Institute of Built Environment and Spatial Policy, Faculty of Geographical Sciences, University of Łódź, Łódź, Poland.
2. Institute of Urban Geography, Tourism Studies and Geoinformation, Faculty of Geographical Sciences, University of Łódź, Łódź, Poland; Centre for Migration and Urban Studies, Department of Geography, University of Tartu, Tartu, Estonia; Department of Geography, Environmental, Management and Energy Studies, University of Johannesburg, Johannesburg, South Africa.