Starzec, Krzysztof, Anna Waśkowska, Jan Golonka, Aleksandra Gawęda, and Krzysztof Szopa. 2020. “Rocky Sandstone Landforms in Istebna, Silesian Beskid (Outer Carpathians, Poland)”. Geotourism/Geoturystyka, no. 1–2 (52–53) (March):2. https://doi.org/10.7494/geotour.2018.52-53.2.