Mais, Karl. “Roofless Caves, a Polygenetic Status of Cave Development With Special References to Cave Regions in the Eastern Calcareous Alps in Salzburg and Central Alps, Austria”. Acta Carsologica 28, no. 2 (June 1, 2016). Accessed April 20, 2024. https://ojs.zrc-sazu.si/carsologica/article/view/489.