Sudradjat, Adjat, Ildrem Syafri, and E. T. Paripurno. 2011. “The Characteristics of Lahar in Merapi Volcano, Central Java As the Indicator of the Explosivity During Holocene”. Indonesian Journal on Geoscience 6 (2):69-74. https://doi.org/10.17014/ijog.6.2.69-74.