@article {MR1307966,
    AUTHOR = {Ward, Thomas},
     TITLE = {Automorphisms of {$\bold Z\sp d$}-subshifts of finite type},
   JOURNAL = {Indag. Math. (N.S.)},
  FJOURNAL = {Koninklijke Nederlandse Akademie van Wetenschappen.
              Indagationes Mathematicae. New Series},
    VOLUME = {5},
      YEAR = {1994},
    NUMBER = {4},
     PAGES = {495--504},
      ISSN = {0019-3577},
   MRCLASS = {28D15 (54H20)},
  MRNUMBER = {MR1307966 (97a:28014)},
}