Chien, Li-Hsin; Barnes, Joshua E., Kewley, Lisa J., Chambers, Kenneth, C. «Multiobject Spectroscopy of Young Star Clusters in NGC 4676». The Astrophysical Journal, 660, 2, 5-2007, pàg. 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. «Multiobject Spectroscopy of Young Star Clusters in NGC 4676». The Astrophysical Journal, 660, 2, 5-2007, pàg. 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. «Multiobject Spectroscopy of Young Star Clusters in NGC 4676». The Astrophysical Journal, 660, 2, 5-2007, pàg. L105–L108. arXiv: astro-ph/0703510. Bibcode: 2007ApJ...660L.105C. DOI: 10.1086/518215.