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_183_03.PDF (Any fulltext)
Wenzel, M.(2003). Kapital zagraniczny w polskiej gospodarce (Foreign capital in the Polish economy). Warsaw: CBOS (Public Opinion Research Center).