Wenzel, Michal Projekte von Gastwissenschaftlern und Postdoc-Stipendiaten, MPI for the Study of Societies, Max Planck Society; Public Opinion Research Center (CBOS), Warsaw;
http://www.cbos.pl/SPISKOM.POL/2003/K_042_03.PDF (Any fulltext)
Wenzel, M.(2003). Postrzeganie praw pracowniczych w zakladach pracy i skutecznosc zwiazków zawodowych w ich egzekwowaniu (Observing the rights of employees by the employers and the effectiveness of trade unions in their enforcement). Warsaw: CBOS (Public Opinion Research Center).