@article{MOMA_1976__81_177744,
     author = {Christoph Kopf},
     title = {Zum {Einbettungsproblem} f\"ur {Markoff-Prozesse.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {119--130},
     publisher = {mathdoc},
     volume = {81},
     year = {1976},
     zbl = {0337.60059},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1976__81_177744/}
}