LENART, Łukasz; MAZUR, B.; PIPIEŃ, M. Statistical analysis of business cycle fluctuations in Poland before and after the crisis. Equilibrium. Quarterly Journal of Economics and Economic Policy, [S. l.], v. 11, n. 4, p. 769–783, 2016. DOI: 10.12775/EQUIL.2016.035. Disponível em: http://economic-research.pl/Journals/index.php/eq/article/view/108. Acesso em: 31 may. 2023.