Woźniak-Jęchorek, Beata. “The Effect of Interest Groups on the Labour Market. Trade Unions in Poland”. Studia Oeconomica Posnaniensia 2, no. 7 (July 31, 2014): 73–93. Accessed September 3, 2026. https://journals.ue.poznan.pl/soep/article/view/3316.