A mid-infrared spectroscopic survey of starburst galaxies: Excitation and abundances A. Verma, D. Lutz, E. Sturm, A. Sternberg, R. Genzel and W. Vacca A&A, 403 3 (2003) 829-846 Published online: 23 May 2003 DOI: 10.1051/0004-6361:20030408