Lučić, Ivo. “Shafts of Life and Shafts of Death in Dinaric Karst, Popovo Polje Case (Bosnia & Hercegovina)”. Acta Carsologica 36, no. 2 (September 1, 2007). Accessed April 18, 2024. https://ojs.zrc-sazu.si/carsologica/article/view/201.