Chien, Li-Hsin; Barnes, Joshua E., Kewley, Lisa J., Chambers, Kenneth, C. (May 2007). “Multiobject Spectroscopy of Young Star Clusters in NGC 4676”. The Astrophysical Journal660 (2): L105–L108. arXiv:astro-ph/0703510. Bibcode: 2007ApJ...660L.105C. doi:10.1086/518215.
Chien, Li-Hsin; Barnes, Joshua E., Kewley, Lisa J., Chambers, Kenneth, C. (May 2007). “Multiobject Spectroscopy of Young Star Clusters in NGC 4676”. The Astrophysical Journal660 (2): L105–L108. arXiv:astro-ph/0703510. Bibcode: 2007ApJ...660L.105C. doi:10.1086/518215.
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Chien, Li-Hsin; Barnes, Joshua E., Kewley, Lisa J., Chambers, Kenneth, C. (May 2007). “Multiobject Spectroscopy of Young Star Clusters in NGC 4676”. The Astrophysical Journal660 (2): L105–L108. arXiv:astro-ph/0703510. Bibcode: 2007ApJ...660L.105C. doi:10.1086/518215.