Odin observations of the Galactic centre in the 118-GHz band - Upper limit to the O2 abundanceAa. Sandqvist, B. Larsson, Å. Hjalmarson, P. Bergman, P. Bernath, U. Frisk, M. Olberg, L. Pagani and L. M. ZiurysA&A, 482 3 (2008) 849-853DOI: https://doi.org/10.1051/0004-6361:200809436
