Konopielko, Łukasz, and Diana Radkova. “Price Dispersion and Online Markets Maturity in Poland”. Acta Universitatis Lodziensis. Folia Oeconomica 3, no. 329 (September 22, 2017): [7]-21. Accessed December 5, 2025. https://www.czasopisma.uni.lodz.pl/foe/article/view/769.