Hakimah, N. L., I. G. M. Sanjaya, E. Hariyono, and A. Kodir. “Geotourism: Use of Environmentally Friendly Geological Wealth: Field Study of Kayangan Api, Mystical Tourism for the Traces of Empu Supo in Bojonegoro”. Studies in Philosophy of Science and Education, Vol. 4, no. 3, Nov. 2023, pp. 94-102, doi:10.46627/sipose.v4i3.276.