Deuterium chemistry in the Orion Bar PDR - “Warm” chemistry starring CH2D+ B. Parise, S. Leurini, P. Schilke, E. Roueff, S. Thorwirth and D. C. Lis A&A, 508 2 (2009) 737-749 Published online: 21 October 2009 DOI: 10.1051/0004-6361/200912774