The great disk of Milky-Way satellites and cosmological sub-structures
  We show that the shape of the observed distribution of Milky Way (MW) satellites is inconsistent with being drawn from a cosmological sub-structure population with a confidence of 99.5 per cent. Most of the MW satellites therefore cannot be related to dark-matter dominated satellites. 
Pavel Kroupa (University of Bonn), Christian Theis (University of   Vienna), Christian M. Boily (University of Strasbourg)