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Busemann, Henner; Bühler, Fritz; Grimberg, A.; Heber, V.S.; Agafonov, Y.N.; Baur, H.; Bochsler, Peter; Eismont, N.A.; Wieler, R.; Zastenker, G.N. (2006). Interstellar Helium Trapped with the COLLISA Experiment on the MiR Space Station-Improved Isotope Analysis by In Vacuo Etching. Astrophysical journal, 639(1), pp. 246-258. London: Institute of Physics Publishing IOP 10.1086/499223
