JÄ™drzejczak-Gas, Janina, and Anetta Barska. “Assessment of the Economic Development of Polish Regions in the Context of the Implementation of the Concept of Sustainable Development - Taxonomic Analysis”. European Journal of Sustainable Development 8, no. 5 (October 1, 2019): 222. Accessed November 22, 2024. https://ojs.ecsdev.org/index.php/ejsd/article/view/936.