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Cited article:

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Variation of Broad Emission Lines from QSOs with Optical/UV Periodicity to Test the Interpretation of Supermassive Binary Black Holes

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Variations of broad emission lines from periodicity QSOs under the interpretation of supermassive binary black holes with misaligned circumbinary broad line regions

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Chandra Observations of Candidate Subparsec Binary Supermassive Black Holes

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Testing the relativistic Doppler boost hypothesis for the binary candidate quasar PG1302-102 with multiband Swift data

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Possible evidence of a supermassive black hole binary with two radio jets in blazar 3C279

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