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Graham, Alister W.; Guzmán, Rafael. HST Photometry of Dwarf Elliptical Galaxies in Coma, and an Explanation for the Alleged Structural Dichotomy between Dwarf and Bright Elliptical Galaxies. S. 2936–2950. Astronomical Journal [online]. Červen 2003 [cit. 2016-08-17]. Roč. 125, čís. 6, s. 2936–2950. Dostupné online. DOI10.1086/374992. Bibcode2003AJ....125.2936G. (anglicky)
Moore, Ben; Katz, Neal; Lake, George, et al. Galaxy harassment and the evolution of clusters of galaxies. S. 613–616. Nature [online]. Únor 1996 [cit. 2016-08-17]. Roč. 379, čís. 6566, s. 613–616. Dostupné online. DOI10.1038/379613a0. Bibcode1996Natur.379..613M. (anglicky)