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- [4] Study of X-ray point sources in NGC 5643 and NGC 7457 with Chandra Astrophysics and Space Science, 2017, 362
- [5] A study of X-ray sources in the central region of NGC 1569 with Chandra PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 2004, (155): : 335 - 336
- [6] Discovery of bright variable X-ray sources in NGC 1569 with Chandra ASTROPHYSICAL JOURNAL, 2003, 591 (02): : L99 - L102