Pach-Gurgul A, Ulbrych M. Energy Efficiency of the Polish Industrial Sector in the Context of the Concept of Sustainable Development. Prace KGP PTG [Internet]. 2019 Dec. 31 [cited 2024 Nov. 23];33(4):95-113. Available from: https://prace-kgp.uken.krakow.pl/article/view/5737