Agustin, Helfi, Muchamad Rifai, and Suryo Ediyono. “When Remaining Volcanic Eruptions Become Tourism Commodities: A Risk Analysis of Merapi Lava Tour Tourism Objects in Yogyakarta”. Jurnal kesehatan komunitas (Journal of community health) 8, no. 2 (July 5, 2022): 219–228. Accessed April 23, 2024. https://jurnal.htp.ac.id/index.php/keskom/article/view/1077.