Pawłowska, Małgorzata, and Katarzyna Puchalska. “Analysis of Competition and Concentration on the Retail Market in Poland Based on the Linda Index”. Kwartalnik Kolegium Ekonomiczno-Społecznego. Studia i Prace, no. 4(40) (December 31, 2019): 11–27. Accessed November 14, 2026. https://econjournals.sgh.waw.pl/kwes/article/view/3712.