IGNATOWICZ, Grzegorz and DOŁĘGOWSKA, Edyta. Renewable energy sources in the light of regulations of the Polish law and the European Union Law. Polish Yearbook of Environmental Law. Online. 6 August 2014. No. 4, pp. 129-142. [Accessed 17 August 2024]. DOI 10.12775/PYEL.2014.008.