Referensi:
1. Keen. 2008. Volcanoes and Climate Change since 1960, What Does the Moon Have to Say? Atmospheric & Oceanic Sciences, Univ. of Colorado, Boulder.
2. Hofmann dkk. 2003. Surface-based Observations of Volcanic Emission to the Stratosphere. Volcanism & the Earth's Atmosphere, Geophysical Monograph 139, American Geophysical Union.
