Bieniek B, Kordysh A, Mirosławski M, Nowak K, Sękowski K, Sierka E. Geoproduct potential analysis based on the example of the GEOsfera Ecological and Geological Education Center in Jaworzno. geotour. 2021;(3–4 (58–59):28. doi:10.7494/geotour.2019.58-59.28