Star-formation laws in luminous infrared galaxies - New observational constraints on models S. García-Burillo, A. Usero, A. Alonso-Herrero, J. Graciá-Carpio, M. Pereira-Santaella, L. Colina, P. Planesas and S. Arribas A&A, 539 (2012) A8 Published online: 17 February 2012 DOI: 10.1051/0004-6361/201117838