@article{MOMA_1960__64_177094,
     author = {Herbert Izbicki},
     title = {Graphentransformationen.},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {135--175},
     publisher = {mathdoc},
     volume = {64},
     year = {1960},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1960__64_177094/}
}