MARSZAŁEK, Henryk and RYSIUKIEWICZ, Michał. Aluminium in waters of the active exchange zone in the Karkonosze National Park (Western Sudetes, SW Poland). Bulletin of Geography. Physical Geography Series. Online. 31 December 2019. No. 17, pp. 101-110. [Accessed 11 August 2026]. DOI 10.2478/bgeo-2019-0018.