@article{ref1,
title="Developing the forms of spatial mobility of the population",
journal="Naselenie",
year="1991",
author="Chermak, Z.",
volume="9",
number="3-4",
pages="76-80",
abstract="The author classifies types of migration, including commuting, temporary migration, labor migration, and permanent movement. (SUMMARY IN ENG)<p /> <p>Language: bg</p>",
language="bg",
issn="0205-0617",
doi="",
url="http://dx.doi.org/"
}