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- [2] 3C-273 - X-RAY VARIABILITY, SPECTRUM, AND POSITION ASTROPHYSICAL JOURNAL, 1979, 230 (01): : L5 - &
- [5] THE HIGH-ENERGY X-RAY-SPECTRUM OF SCORPIUS-X-1 ASTROPHYSICAL JOURNAL, 1980, 238 (03): : 982 - 984
- [7] LIMITS ON INTERGALACTIC HELIUM FROM 3C 273 X-RAY-SPECTRUM ASTROPHYSICAL JOURNAL, 1972, 174 (03): : 471 - &
- [9] X-RAY-EMISSION ASSOCIATED WITH THE JET IN 3C-273 ASTROPHYSICAL JOURNAL, 1987, 313 (01): : 136 - 140