Spitzer's large CO2 ice detection toward the L723 class 0 object E. Dartois, K. Pontoppidan, W.-F. Thi and G. M. Muñoz Caro A&A, 444 3 (2005) L57-L60 Published online: 05 December 2005 DOI: 10.1051/0004-6361:200500211