(1)
Starzec, K.; Waśkowska, A.; Golonka, J.; Gawęda, A.; Szopa, K. Rocky Sandstone Landforms in Istebna, Silesian Beskid (Outer Carpathians, Poland). geotour 2020, No. 1–2 (52–53), 2. https://doi.org/10.7494/geotour.2018.52-53.2.