@article {MR961739,
    AUTHOR = {Lind, D. A. and Ward, T.},
     TITLE = {Automorphisms of solenoids and {$p$}-adic entropy},
   JOURNAL = {Ergodic Theory Dynam. Systems},
  FJOURNAL = {Ergodic Theory and Dynamical Systems},
    VOLUME = {8},
      YEAR = {1988},
    NUMBER = {3},
     PAGES = {411--419},
      ISSN = {0143-3857},
   MRCLASS = {28D20 (58F11)},
  MRNUMBER = {MR961739 (90a:28031)},
MRREVIEWER = {Kenneth R. Berg},
}