WASET
Maryanto, S. , Santosa, D. , Mulyana, I. , Hendrasto, M. (2010). 'Preliminary Chaos Analyses of Explosion Earthquakes Followed by Harmonic Tremors at Semeru Volcano, East Java, Indonesia'. World Academy of Science, Engineering and Technology, Open Science Index 47, International Journal of Geological and Environmental Engineering, 4(11), 612 - 617.