Symmetries in multi-Higgs-doublet models
  We report the recent progress in understanding of symmetries which can be implemented in the scalar sector of electroweak symmetry breaking models with several Higgs doublets. In particular we present the list of finite reparametrization symmetry groups which can appear in the three-Higgs-doublet models. 
I. P. Ivanov, E. Vdovin
hep-ph