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- [8] THE INTERPRETATION OF THE X-RAY VARIABILITY OF TYPE-1 SEYFERT-GALAXIES AND QUASARS ASTRONOMICHESKII ZHURNAL, 1985, 62 (06): : 1227 - 1229
- [9] FAR-ULTRAVIOLET AND OPTICAL SPECTROPHOTOMETRY OF X-RAY SELECTED SEYFERT-GALAXIES ASTROPHYSICAL JOURNAL, 1986, 305 (01): : 167 - 174
- [10] X-RAY LUMINOSITY AND THE HYDROGEN-LINE RATIOS OF QUASARS AND SEYFERT-GALAXIES ASTRONOMICAL JOURNAL, 1985, 90 (01): : 1 - 4