Huang, Zhenping; Sarazin, Craig L. (Nisan 1996). "A High-Resolution ROSAT X-Ray Study of the Hercules Cluster". The Astrophysical Journal (İngilizce). Cilt 461. s. 622. Bibcode:1996ApJ...461..622H. doi:10.1086/177090. ISSN0004-637X.
Young, E.; Low, F. J.; Soifer, B. T.; Neugebauer, G.; Rowan-Robinson, M.; Clegg, P. E.; Miley, G.; de Jong, T.; Gautier, T. N. (Mart 1984). "The infrared properties of galaxy clusters - IRAS observations of the Hercules Cluster (Abell 2151)". The Astrophysical Journal (İngilizce). Cilt 278. ss. L75-L78. Bibcode:1984ApJ...278L..75Y. doi:10.1086/184227. ISSN0004-637X.
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Huang, Zhenping; Sarazin, Craig L. (Nisan 1996). "A High-Resolution ROSAT X-Ray Study of the Hercules Cluster". The Astrophysical Journal (İngilizce). Cilt 461. s. 622. Bibcode:1996ApJ...461..622H. doi:10.1086/177090. ISSN0004-637X.
Young, E.; Low, F. J.; Soifer, B. T.; Neugebauer, G.; Rowan-Robinson, M.; Clegg, P. E.; Miley, G.; de Jong, T.; Gautier, T. N. (Mart 1984). "The infrared properties of galaxy clusters - IRAS observations of the Hercules Cluster (Abell 2151)". The Astrophysical Journal (İngilizce). Cilt 278. ss. L75-L78. Bibcode:1984ApJ...278L..75Y. doi:10.1086/184227. ISSN0004-637X.
Huang, Zhenping; Sarazin, Craig L. (Nisan 1996). "A High-Resolution ROSAT X-Ray Study of the Hercules Cluster". The Astrophysical Journal (İngilizce). Cilt 461. s. 622. Bibcode:1996ApJ...461..622H. doi:10.1086/177090. ISSN0004-637X.
Young, E.; Low, F. J.; Soifer, B. T.; Neugebauer, G.; Rowan-Robinson, M.; Clegg, P. E.; Miley, G.; de Jong, T.; Gautier, T. N. (Mart 1984). "The infrared properties of galaxy clusters - IRAS observations of the Hercules Cluster (Abell 2151)". The Astrophysical Journal (İngilizce). Cilt 278. ss. L75-L78. Bibcode:1984ApJ...278L..75Y. doi:10.1086/184227. ISSN0004-637X.