共 7 条
- [3] VARIABILITY AND ABSORPTION OF X-RAY-EMISSION FROM NGC-4151 [J]. ASTROPHYSICAL JOURNAL, 1976, 207 (03) : L159 - L162
- [6] MUSHOTZKY RF, IN PRESS
- [7] SUDDEN INCREASE IN X-RAY FLUX FROM CENTAURUS-A [J]. ASTROPHYSICAL JOURNAL, 1975, 199 (03) : L139 - L142