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Luděk Šídlo
Department of Demography and Geodemography, Faculty of Science,
Charles University
Branislav Šprocha
Centre of Social and Psychological Sciences,
Slovak Academy of Sciences
Bratislava, Slovakia
Pavol Ďurček
Department of Economic and Social Geography, Demography and Territorial Development Faculty of Natural Sciences,
Comenius University in BratislavaSlovakia