Kempe, Stephan. “Natural Speleothem Damage in Postojnska Jama, Slovenia, Caused by Glacial Cave Ice? A First Assessment”. Acta Carsologica 33, no. 1 (May 19, 2016). Accessed May 3, 2024. https://ojs.zrc-sazu.si/carsologica/article/view/329.