@article{MOMA_1975__80_177718,
     author = {Roland Fischer},
     title = {Sofic {Systems} and {Graphs.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {179--186},
     publisher = {mathdoc},
     volume = {80},
     year = {1975},
     zbl = {0314.54043},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1975__80_177718/}
}