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- [4] NEW X-RAY SPECTRAL OBSERVATIONS OF NGC-4151 WITH ASCA ASTROPHYSICAL JOURNAL, 1994, 436 (01): : L27 - L30
- [5] X-RAY OBSERVATIONS OF NGC-253 AND M83 WITH GINGA ASTROPHYSICAL JOURNAL, 1990, 365 (01): : 180 - 185
- [6] GINGA OBSERVATIONS OF X-RAY PULSARS PROCEEDINGS OF THE 23RD ESLAB SYMPOSIUM ON TWO TOPICS IN X-RAY ASTRONOMY, VOLS 1 AND 2: X-RAY BINARIES; AGN AND THE X-RAY BACKGROUND, 1989, 296 : 45 - 55