M. Markowska and M. Sobolewski, “SENSITIVITY OF THE EUROPEAN UNION REGIONAL LABOUR MARKETS TO ECONOMIC CRISIS. CLASSIFICATION USING WARD METHOD WITH COHESION CRITERION”, Folia Oeconomica, vol. 6, no. 308, May 2015, Accessed: Apr. 14, 2026. [Online]. Available: https://www.czasopisma.uni.lodz.pl/foe/article/view/283