The Gutzwiller Density Functional Theory
  In this tutorial presentation, we give a comprehensive introduction into the Gutzwiller variational approach and its merger with the density functional theory. The merits of this method are illustrated by a discussion of results for two-band Hubbard models and realistic multi-band Hamiltonians for iron-pnictide systems. 
J\"org B\"unemann
cond-mat.str-el