The distribution of the ISM in the Milky Way - A three-dimensional large-scale model A. Misiriotis, E. M. Xilouris, J. Papamastorakis, P. Boumis and C. D. Goudis A&A, 459 1 (2006) 113-123 Published online: 12 September 2006 DOI: 10.1051/0004-6361:20054618