Voight B, Young KD, Hidayat D, Purbawinata M A, Ratdomopurbo A, Suharna, Panut, Sayudi D S, LaHusen R, Marso J et al..  2000.  Deformation and seismic precursors to dome-collapse and fountain-collapse nuees ardentes at Merapi Volcano, Java, Indonesia, 1994-1998. Journal of Volcanology and Geothermal Research. 100:261-287.