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Adén, D. «A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules. Metallicity, velocities, and a clean list of RGB members». Astronomy and Astrophysics, 546, 3, 2009, pàg. 1147–1168. arXiv: 0908.3489. Bibcode: 2009A&A...506.1147A. DOI: 10.1051/0004-6361/200912718.
Adén, D. «A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules. Metallicity, velocities, and a clean list of RGB members». Astronomy and Astrophysics, 546, 3, 2009, pàg. 1147–1168. arXiv: 0908.3489. Bibcode: 2009A&A...506.1147A. DOI: 10.1051/0004-6361/200912718.
Adén, D. «A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules. Metallicity, velocities, and a clean list of RGB members». Astronomy and Astrophysics, 546, 3, 2009, pàg. 1147–1168. arXiv: 0908.3489. Bibcode: 2009A&A...506.1147A. DOI: 10.1051/0004-6361/200912718.