Measurement of charged pions in 12C + 12C collisions at 1 A GeV and 2 A GeV with HADES The HADES Collaboration, G. Agakishiev, C. Agodi, A. Balanda, G. Bellia, D. Belver, A. Belyaev, J. Bielcik, A. Blanco, A. Bortolotti et al. (116 more) Eur. Phys. J. A, 40 1 (2009) 45-59 Published online: 04 April 2009 DOI: 10.1140/epja/i2008-10746-7