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. 119 (1–4): 241–254. Bibcode:2003JVGR..119..241G. doi:10.1016/S0377-0273(02)00356-6. ISSN0377-0273.
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. 119 (1–4): 241–254. Bibcode:2003JVGR..119..241G. doi:10.1016/S0377-0273(02)00356-6. ISSN0377-0273.
"List and Description"(PDF). rgs.org. Royal Geographical Society. Archived from the original(PDF) on 27 August 2017. Retrieved 27 August 2017.
"Recipients 1970-2016"(PDF). Medals and Awards. Royal Geographical Society. Archived from the original(PDF) on 27 August 2017. Retrieved 27 August 2017.
"List and Description"(PDF). rgs.org. Royal Geographical Society. Archived from the original(PDF) on 27 August 2017. Retrieved 27 August 2017.
"Recipients 1970-2016"(PDF). Medals and Awards. Royal Geographical Society. Archived from the original(PDF) on 27 August 2017. Retrieved 27 August 2017.
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. 119 (1–4): 241–254. Bibcode:2003JVGR..119..241G. doi:10.1016/S0377-0273(02)00356-6. ISSN0377-0273.