@article{MOMA_1975__80_177702,
     author = {Karl Wilhelm Bauer},
     title = {Eine verallgemeinerte {Darboux-Gleichung} {I}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {80},
     year = {1975},
     zbl = {0305.35030},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1975__80_177702/}
}