Short timescale broad emission-line flux variability in high-luminosity active galactic nuclei
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1997 ◽
Vol 159
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pp. 175-178
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2014 ◽
Vol 439
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pp. 1051-1062
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1995 ◽
Vol 272
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pp. 647-664
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2011 ◽
Vol 414
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pp. 218-240
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1985 ◽
Vol 213
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pp. 665-710
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