@article{MAN_1979__239_163205,
     author = {Michael Langenbruch},
     title = {P-Functionale und {Randwerte} zu {Hypoelliptischen} {Differentialoperatoren.}},
     journal = {Mathematische Annalen},
     pages = {55--74},
     publisher = {mathdoc},
     volume = {239},
     year = {1979},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1979__239_163205/}
}