Pawęta B, Pawęta E. Comparison of economic cycles morphology based on Polish gross domestic product analysis in years 2000–2013. W: Urbanek P, red. Economy Today: An Interdisciplinary Approach to Contemporary Economic Challenges. Ekonomia. Wydawnictwo Uniwersytetu Łódzkiego; 2016:81-94. doi:10.18778/8088-012-2.05