Sahrina, Alfi, Farah Dian Safitri, Febrian Arrya Withuda, Almadya Satriyo, and Mika Talita Gabriele. “Use of Karst Caves in Malang Regency and the Possible Challenges to Their Existence”. KnE Social Sciences 7, no. 16 (October 12, 2022): 438–449. Accessed April 26, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/12187.