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Foley et al.: A Definitive Measurement of Time Dilation in the Spectral Evolution of the Moderate-Redshift Type Ia Supernova 1997ex. In: The Astrophysical Journal. 626. Jahrgang, Nr.1, 2005, S.L11-L14, doi:10.1086/431241, arxiv:astro-ph/0504481, bibcode:2005ApJ...626L..11F.
Lubin, Lori M.; Sandage, Allan: The Tolman Surface Brightness Test for the Reality of the Expansion. IV. A Measurement of the Tolman Signal and the Luminosity Evolution of Early-Type Galaxies. In: The Astronomical Journal. 122. Jahrgang, Nr.3, 2001, S.1084–1103, doi:10.1086/322134, arxiv:astro-ph/0106566, bibcode:2001AJ....122.1084L.
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Foley et al.: A Definitive Measurement of Time Dilation in the Spectral Evolution of the Moderate-Redshift Type Ia Supernova 1997ex. In: The Astrophysical Journal. 626. Jahrgang, Nr.1, 2005, S.L11-L14, doi:10.1086/431241, arxiv:astro-ph/0504481, bibcode:2005ApJ...626L..11F.
Lubin, Lori M.; Sandage, Allan: The Tolman Surface Brightness Test for the Reality of the Expansion. IV. A Measurement of the Tolman Signal and the Luminosity Evolution of Early-Type Galaxies. In: The Astronomical Journal. 122. Jahrgang, Nr.3, 2001, S.1084–1103, doi:10.1086/322134, arxiv:astro-ph/0106566, bibcode:2001AJ....122.1084L.