Melyyanti, Meli, Khafidh Nur Azis, and Kholis Nurhanafi. “Sedimentary Layers Identification of Bribin Underground River in Gunungkidul Utilizing the Theory of HVSR Microtremor”. Jurnal Penelitian Saintek 30, no. 2 (October 1, 2025): 97–103. Accessed December 23, 2025. https://jurnal.uny.ac.id/index.php/saintek/article/view/89754.