Radwański, Andrzej B. “The Oil and Ozokerite Mine in Boryslav and Historical Monuments of Petroleum and Salt Industries in the Vicinity of Boryslav (Ukrainian Fore-Carpathian Region)”. Geotourism/Geoturystyka, no. 18 (): 35. https://doi.org/10.7494/geotour.2009.18.35.