... gas[*]
Full appendix and Figs. 8 to 13 are only available in electronic form at http://www.edpsciences.org 
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...[*]
Full Tables 6, 7, 9 and 10 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/433/497 
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... population[*]
Based on observations obtained at the European Southern Observatory, La Silla, Chile (Programs Nr. 60.A-0647 and 61.A-0406). 
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... IRAF[*]
IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy Inc., under cooperative agreement with the National Science Foundation. 
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Copyright ESO 2005
Article Contents
1 Introduction
2 Characterization of the sample
3 Observations and data-reduction
4 Measurements of line-strength indices and transformation to the Lick-IDS System
5 Results
6 Summary
References
Online Material
Appendix A: Relevant notes on individual galaxies from the literature
List of tables
List of figures