NIR spectroscopy of luminous infrared galaxies and the hydrogen recombination photon deficitJ. R. Valdés, S. Berta, A. Bressan, A. Franceschini, D. Rigopoulou and G. RodighieroA&A, 434 1 (2005) 149-161DOI: https://doi.org/10.1051/0004-6361:20035831