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2002ApJ...564..624T - Astrophys. J., 564, 624-630 (2002/January-2)
Quasar spectral slope variability in the optical band.
TREVESE D. and VAGNETTI F.
Abstract (from CDS):
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Active - Galaxies: Photometry - Galaxies: Seyfert - Galaxies: Quasars: General
Simbad objects: 4
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