Dust coagulation processes as constrained by far-infrared observations M. Köhler, B. Stepnik, A. P. Jones, V. Guillet, A. Abergel, I. Ristorcelli and J.-P. Bernard A&A, 548 (2012) A61 Published online: 22 November 2012 DOI: 10.1051/0004-6361/201218975