WITKOWSKA, D. Wage disparities in Poland: Econometric analysis. Metody Ilościowe w Badaniach Ekonomicznych, [S. l.], v. 13, n. 2, p. 115–124, 2012. Disponível em: https://qme.sggw.edu.pl/article/view/3541. Acesso em: 23 lis. 2024.