Tham khảo NGC_188

  1. 1 2 3 4 5 6 “NGC 188”. SIMBAD. Trung tâm dữ liệu thiên văn Strasbourg.
  2. 1 2 Bonatto, C.; Bica, E.; Santos, J. F. C., Jr. (2005). “Spatial dependence of 2MASS luminosity and mass functions in the old open cluster NGC 188”. Astronomy and Astrophysics. 433 (3): 917–929. arXiv:astro-ph/0502453. Bibcode:2005A&A...433..917B. doi:10.1051/0004-6361:20041113.
  3. ↑ Clark, R. N. (1990). Visual Astronomy of the Deep Sky. Cambridge University Press. tr. 287. Bibcode:1990vads.book.....C. ISBN 978-0521361552.
  4. ↑ VandenBerg, D. A.; Stetson, P. B. (2004). “On the Old Open Clusters M67 and NGC 188: Convective Core Overshooting, Color‐Temperature Relations, Distances, and Ages”. Publications of the Astronomical Society of the Pacific. 116 (825): 997–1011. Bibcode:2004PASP..116..997V. doi:10.1086/426340.
  5. ↑ Clark, R. N. (1990). Visual Astronomy of the Deep Sky. Cambridge University Press. tr. 287. Bibcode:1990vads.book.....C. ISBN 0521361559.

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