1. Allen AG, Oppenheimer C, Ferm M, Baxter PJ, Horrocks LA, Galle B, McGonigle AJS, Duffell HJ (2002) Primary sulfate aerosol and associated emissions from Masaya Volcano, Nicaragua. J Geophys Res D Atmos 107(D23):4682. doi: 10.1029/2002JD002120
2. Andres RJ, Kasgnoc AD (1998) A time-averaged inventory of subaerial volcanic sulfur emissions. J Geophys Res 103:25251–25261
3. Andres RJ, Rose WI, Kyle PR, deSilva S, Francis P, Gardeweg M, Moreno Roa H (1991) Excessive sulfur dioxide emissions from Chilean volcanoes. J Volcanol Geotherm Res 46:323–329
4. Casadevall TJ, Johnston DA, Harris DM, Rose Jr. WI, Malinconico LL, Stoiber RE, Bornhorst TJ, Williams SN, Woodruff L, Thompson JM (1981) SO2 emission rates at Mount St. Helens from March 29 through December, 1980. In: Lipman PW, Mullineaux DR (Eds) The 1980 Eruptions of Mount St. Helens. US Geol Surv Prof Paper 1250, pp. 193–200
5. CCVG-IAVCEI (2003) Eighth Field Workshop on Volcanic Gases, March 26 to April 1, 2003. In: The Commission on the Chemistry of Volcanic Gases & International Association of Volcanology and Chemistry of the Earth’s Interior, Nicaragua and Costa Rica,