Nearby early-type galaxies with ionized gas - I. Line-strength indices of the underlying stellar populationR. Rampazzo, F. Annibali, A. Bressan, M. Longhetti, F. Padoan and W. W. ZeilingerA&A, 433 2 (2005) 497-513DOI: https://doi.org/10.1051/0004-6361:200400122
