MICHALAK, Joanna. Footprints of past geological events in rocks from Krucze Skały excavation (Karkonosze Mountains, SW Poland). Bulletin of Geography. Physical Geography Series. Online. 31 December 2019. No. 17, pp. 17-29. [Accessed 16 December 2025]. DOI 10.2478/bgeo-2019-0011.