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Graham, Alister W.; Dullo, Bililign T.; Savorgnan, Giulia A. D. (2015). "Hiding in Plain Sight: An Abundance of Compact Massive Spheroids in the Local Universe". The Astrophysical Journal. 804 (1): 32. arXiv:1502.07024. Bibcode:2015ApJ...804...32G. doi:10.1088/0004-637X/804/1/32.