@article{IM_1984__76_143114,
     author = {Klaus Schmidt},
     title = {Invariants for finitary isomorphisms with finite expected code lengths.},
     journal = {Inventiones mathematicae},
     pages = {33--40},
     publisher = {mathdoc},
     volume = {76},
     year = {1984},
     zbl = {0563.28009},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__76_143114/}
}