Kuntschner, Harald; Lucey, John R.; Smith, Russell J.; Hudson, Michael J.; Davies, Roger L. (2001-05-21). «On the dependence of spectroscopic indices of early-type galaxies on age, metallicity and velocity dispersion» (στα αγγλικά). Monthly Notices of the Royal Astronomical Society323 (3): 615–629. doi:10.1046/j.1365-8711.2001.04263.x. ISSN0035-8711. Bibcode: 2001MNRAS.323..615K.
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Kuntschner, Harald; Lucey, John R.; Smith, Russell J.; Hudson, Michael J.; Davies, Roger L. (2001-05-21). «On the dependence of spectroscopic indices of early-type galaxies on age, metallicity and velocity dispersion» (στα αγγλικά). Monthly Notices of the Royal Astronomical Society323 (3): 615–629. doi:10.1046/j.1365-8711.2001.04263.x. ISSN0035-8711. Bibcode: 2001MNRAS.323..615K.
Kuntschner, Harald; Lucey, John R.; Smith, Russell J.; Hudson, Michael J.; Davies, Roger L. (2001-05-21). «On the dependence of spectroscopic indices of early-type galaxies on age, metallicity and velocity dispersion» (στα αγγλικά). Monthly Notices of the Royal Astronomical Society323 (3): 615–629. doi:10.1046/j.1365-8711.2001.04263.x. ISSN0035-8711. Bibcode: 2001MNRAS.323..615K.