@article{JRAM_1980__318_152265,
     author = {Werner Balser},
     title = {Zum {Einzigkeitssatz} in der {Invariantentheorie} meromorpher {Differentialgleichungen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {51--82},
     publisher = {mathdoc},
     volume = {318},
     year = {1980},
     zbl = {0425.34010},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__318_152265/}
}