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Galle, Bo; Oppenheimer, Clive; Geyer, Andreas; McGonigle, Andrew J.S; Edmonds, Marie; Horrocks, Lisa «A miniaturised ultraviolet spectrometer for remote sensing of SO₂ fluxes: a new tool for volcano surveillance». Journal of Volcanology and Geothermal Research, 119, 1–4, 2003, pàg. 241–254. DOI: 10.1016/S0377-0273(02)00356-6. ISSN: 0377-0273.
Francis, P.; Horrocks, L.; Oppenheimer, C. «Monitoring gases from andesite volcanoes». Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 358, 1770, 2000, pàg. 1567–1584. DOI: 10.1098/rsta.2000.0604. ISSN: 1364-503X.
Galle, Bo; Oppenheimer, Clive; Geyer, Andreas; McGonigle, Andrew J.S; Edmonds, Marie; Horrocks, Lisa «A miniaturised ultraviolet spectrometer for remote sensing of SO₂ fluxes: a new tool for volcano surveillance». Journal of Volcanology and Geothermal Research, 119, 1–4, 2003, pàg. 241–254. DOI: 10.1016/S0377-0273(02)00356-6. ISSN: 0377-0273.