Galle، Bo؛ Oppenheimer، Clive؛ Geyer، Andreas؛ McGonigle، Andrew J.S؛ Edmonds، Marie؛ Horrocks، Lisa (2003). "A miniaturised ultraviolet spectrometer for remote sensing of SO₂ fluxes: a new tool for volcano surveillance". Journal of Volcanology and Geothermal Research. ج. 119 ع. 1–4: 241–254. Bibcode:2003JVGR..119..241G. DOI:10.1016/S0377-0273(02)00356-6. ISSN:0377-0273.
Galle، Bo؛ Oppenheimer، Clive؛ Geyer، Andreas؛ McGonigle، Andrew J.S؛ Edmonds، Marie؛ Horrocks، Lisa (2003). "A miniaturised ultraviolet spectrometer for remote sensing of SO₂ fluxes: a new tool for volcano surveillance". Journal of Volcanology and Geothermal Research. ج. 119 ع. 1–4: 241–254. Bibcode:2003JVGR..119..241G. DOI:10.1016/S0377-0273(02)00356-6. ISSN:0377-0273.
Galle، Bo؛ Oppenheimer، Clive؛ Geyer، Andreas؛ McGonigle، Andrew J.S؛ Edmonds، Marie؛ Horrocks، Lisa (2003). "A miniaturised ultraviolet spectrometer for remote sensing of SO₂ fluxes: a new tool for volcano surveillance". Journal of Volcanology and Geothermal Research. ج. 119 ع. 1–4: 241–254. Bibcode:2003JVGR..119..241G. DOI:10.1016/S0377-0273(02)00356-6. ISSN:0377-0273.