Derlukiewicz, Niki, and Anna Mempel-Śnieżyk. “European Cities in the Face of Sustainable Development”. Ekonomia i Prawo. Economics and Law 17, no. 2 (June 30, 2018): 125–135. Accessed July 3, 2025. https://apcz.umk.pl/EiP/article/view/EiP.2018.009.