Spectral properties of type Ia supernovae up to z ~ 0.3 J. Nordin, L. Östman, A. Goobar, R. Amanullah, R. C. Nichol, M. Smith, J. Sollerman, B. A. Bassett, J. Frieman, P. M. Garnavich et al. (3 more) A&A, 526 (2011) A119 Published online: 10 January 2011 DOI: 10.1051/0004-6361/201015705