Automorphism Groups and Twisted Modules for Lattice Vertex Operator   Algebras
  We give a complete description of the full automorphism group of a lattice vertex operator algebra, determine the twisted Zhu's algebra for the automorphism lifted from the -1 isometry of the lattice and classify the corresponding irreducible twisted modules through the twisted Zhu algebra. 
Chongying Dong and Kiyokazu Nagatomo