@article{MZ_1965__90_170489,
     author = {Hans Triebel},
     title = {Differenzierbarkeitseigenschaften {Greenscher} {Funktionen} elliptischer {Differentialoperatoren.}},
     journal = {Mathematische Zeitschrift},
     pages = {325--338},
     year = {1965},
     volume = {90},
     zbl = {0132.33503},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__90_170489/}
}