NGC 663 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 663" in Chinese language version.

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  • Pigulski, A.; Kopacki, G.; Kolaczkowski, Z. The young open cluster NGC 663 and its Be stars. Astronomy & Astrophysics. 2001, 376: 144–153. doi:10.1051/0004-6361:20010974. 
  • Phelps, Randy L.; Janes, Kenneth A. Young open clusters as probes of the star-formation process. 2: Mass and luminosity functions of young open clusters. Astronomical Journal. November 1993, 106 (5): 1870–1884. doi:10.1086/116772. 

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