Kadebskaya, Olga, and Ilya Tchaikovskiy. 2015. “Staging in the Hypergene Transformation of Sulphate and Carbonate Rocks (based on Slide-Rocks under Organ Tubes in Kungur Ice Cave)”. Acta Carsologica 44 (2). Ljubljana, Slovenija. https://doi.org/10.3986/ac.v44i2.610.