Kotowicz-Jawor, Joanna, Lesław Pietrewicz, Michał Zajfert, Elżbieta Mączyńska, Tadeusz Baczko, Ewa Puchała-Krzywina, and Urszula Grzelońska. Innovativeness of Polish Economy in the Transitional Stage of Development. Economics. Poland: Lodz University Press, 2019. Accessed January 22, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/941.