Zupan Hajna, N. 2007. 25th Speleological School “Karst and Cryokarst”, Wrocław, Poland, March 19th to 26th, 2007. Acta Carsologica. 36, 2 (Sep. 2007). DOI:https://doi.org/10.3986/ac.v36i2.540.