Haryono, Eko, Sutanto Trijuni Putro, Suratman Suratman, and Sutikno Sutikno. “Karst Morphology of Karangbolong Area, Java-Indonesia”. Acta Carsologica 46, no. 1 (July 4, 2017). Accessed April 20, 2024. https://ojs.zrc-sazu.si/carsologica/article/view/3589.