![](/img/cover-not-exists.png)
Quasar Spectral Slope Variability in the Optical Band
Trevese, Dario, Vagnetti, FaustoVolume:
564
Language:
english
Journal:
The Astrophysical Journal
DOI:
10.1086/324541
Date:
January, 2002
File:
PDF, 174 KB
english, 2002