KARASIEWICZ, Tomasz, TOBOJKO, Lucyna, ŚWITONIAK, Marcin, MILEWSKA, Kinga and TYSZKOWSKI, Sebastian. The morphogenesis of erosional valleys in the slopes of the Drwęca valley and the properties of their colluvial infills. Bulletin of Geography. Physical Geography Series. Online. 6 June 2019. No. 16, pp. 5-20. [Accessed 18 July 2024]. DOI 10.2478/bgeo-2019-0001.