The construction of generalized Dirac operators on the lattice
  We discuss the steps to construct Dirac operators which have arbitrary fermion offsets, gauge paths, a general structure in Dirac space and satisfy the basic symmetries (gauge symmetry, hermiticity condition, charge conjugation, hypercubic rotations and reflections) on the lattice. We give an extensive set of examples and offer help to add further structures. 
P. Hasenfratz, S. Hauswirth, K. Holland, T. Jorg, F. Niedermayer, U.   Wenger (Univ. of Bern)