Sala, Krzysztof. “Industrial Use of Biomass in Poland. Conditions and Barriers”. Studies of the Industrial Geography Commission of the Polish Geographical Society 31, no. 4 (December 21, 2017): 148–156. Accessed May 3, 2024. https://prace-kgp.uken.krakow.pl/article/view/20801653.314.10.