T. Piecuch, K. . Chudy-Laskowska, E. Szczygieł, and R. . Pyrek, “Green economy indicator and the level of socio-economic development - measurement and implications at provincial level”, EiS, vol. 93, no. 2, p. 1005, Jul. 2025, doi: 10.34659/eis.2025.93.2.1005.