Orłowska, A. “Evaluation of the Geotourism Potential of Selected Geological Sites in the Eastern Part of the Borderland Between the Siedlce Upland and Łuków Plain”. Geotourism/Geoturystyka, no. 48-49, July 2018, p. 2, doi:10.7494/geotour.2017.48-49.2.