@article{DOCMA_2011__16__a30,
     author = {Johansen, Rune},
     title = {On the structure of covers of sofic shifts},
     journal = {Documenta mathematica},
     pages = {111--131},
     publisher = {mathdoc},
     volume = {16},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2011__16__a30/}
}