Published in
American Astronomical Society, Astrophysical Journal, 2(564), p. 624-630, 2002
DOI: 10.1086/324541
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Quasar Spectral Slope Variability in the Optical Band
Journal article published in 2002 by
Dario Trevese,
Fausto Vagnetti 
This paper was not found in any repository, but could be made available legally by the author.
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