1. Daag, A.S., Tubianosa, B.S., Newhall, C.G., Tuñgol, N.M., Javier, D., Dolan, M.T., Reyes, P.J.D., Arboleda, R.A., Martinez, M.M.L., Regalado, T.M. (1996). Monitoring sulphur dioxide emission at Mount Pinatubo. [Online] Available at: <
http://pubs.usgs.gov/pinatubo/daag1/
>, [Accessed on 3 Nov 2014]
2. Dalton MP, Watson IM, Nadeau PA, Werner C, Morrow W, Shannon JM (2009) Assessment of the UV camera sulfur dioxide retrieval for point source plumes. J Volcanol Geotherm Res 188(2009):358–366
3. Elias, T., Sutton, A.J. (2012). Sulfur dioxide emission rates from Kīlauea Volcano, Hawai’i, 2007–2010: U.S. Geological Survey Open-File Report 2012–1107, 25 p. (Available at
http://pubs.usgs.gov/of/2012/1107/
)
4. Exton, J.R., US National Aeronautics and Space Administration (1976) Stack plume visualization system, U.S. Pat. 3931462
5. Fellgett PB (1949) On the ultimate sensitivity and practical performance of radiation detectors. J Opt Soc Am (OSA) 39(11):970–976