Zabielska, Izabela. “Cooperation, Partnership and Integration in the Cross-Border Area: The Role of Borders and Cross-Border Cooperation”. Ekonomia i Prawo. Economics and Law 19, no. 3 (September 30, 2020): 569–583. Accessed April 26, 2024. https://apcz.umk.pl/EiP/article/view/EiP.2020.038.