Incomplete Migration : A new Form of Mobility in Central and Eastern Europe. The Case of Polish and Ukrainian Migrants - Okólski, Marek (. Patterns of migration in Central Europe. - Basingstoke, Hampsh. : Palgrave [u.a.], 2001. - XIX, 301 S.. - Kt, graph. Darst.. - ISBN 0-333-80152-0, 2001)