@article{JRAM_1993__437_153505,
     author = {Wolfgang Krieger and Mike Boyle},
     title = {Automorphisms and subsystems of the shift.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {13--28},
     publisher = {mathdoc},
     volume = {437},
     year = {1993},
     zbl = {0774.54026},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1993__437_153505/}
}