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Beth, A.; Altwegg, Kathrin; Balsiger, Hans; Berthelier, J.-J.; Calmonte, Ursina Maria; Combi, M.R.; De Keyser, J.; Dhooghe, F.; Fiethe, B.; Fuselier, S.A.; Galand, M.; Gasc, Sébastien; Gombosi, T.I.; Hansen, K.C.; Hässig, M.; Héritier, K.L.; Kopp, Ernest; Le Roy, Léna; Mandt, K.E.; Peroy, S.; ... (2017). First in-situ detection of the cometary ammonium ion NH⁺₄ (protonated ammonia NH₃) in the coma of 67P/C-G near perihelion. Monthly notices of the Royal Astronomical Society, 462(Suppl_1), S562-S572. Oxford University Press 10.1093/mnras/stw3370
