Knez, M., Slabe, T., Trajanova, M., Akimova, T. and Kalmiykov, I. 2020. The karren peeling off on marbles in Altai (Altai Republic, Russian Federation). Acta Carsologica. 49, 1 (Oct. 2020). DOI:https://doi.org/10.3986/ac.v49i1.7197.