BUGAJSKA, Małgorzata, RANISZEWSKI, Szymon, TOMANEK, Mateusz and BOREK, Dominik. The Rio 20+ process, the idea of sustainable development - current and historical legal perspectives for sport and tourism. Quality in Sport. Online. 29 August 2023. Vol. 14, pp. 135-139. [Accessed 18 July 2024]. DOI 10.12775/QS.2023.14.01.011.