Żebrowska‑Suchodolska, Dorota, and Iwona Piekunko‑Mantiuk. “Similarity and Granger Causality in Polish and Spanish Stock Market Sectors During the COVID–19 Pandemic”. Comparative Economic Research. Central and Eastern Europe 25, no. 3 (September 14, 2022): 90–109. Accessed December 10, 2025. https://www.czasopisma.uni.lodz.pl/CER/article/view/14265.