Paternity skew in seven species of honeybees (Hymenoptera: Apidae: Apis) Helge Schlüns, Robin F.A. Moritz, H. Michael G. Lattorff and Gudrun Koeniger Apidologie, 36 2 (2005) 201-209 Published online: 01 June 2005 DOI: 10.1051/apido:2005006