Wojnicka, Elżbieta. “Polish Provinces As E-Regions in Comparison With the European Union”. Regional Barometer. Analyses & Prognoses, no. 4 (22) (February 2, 2011): 23–35. Accessed May 19, 2024. https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/1356.