Rich, R. M., M. L. M. Collins, C. M. Black, F. A. Longstaff, A. Koch, A. Benson and D. B. Reitzel: A tidally distorted dwarf galaxy near NGC 4449. 482, 7384, 192-194 (2012).
url: http://cdsads.u-strasbg.fr/abs/2012Natur.482..192R
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