@article{MAN_1928__98_159213,
     author = {H. Geppert},
     title = {\"Uber {Randwertprobleme} bei linearen elliptischen {Differentialgleichungen}},
     journal = {Mathematische Annalen},
     pages = {264--272},
     publisher = {mathdoc},
     volume = {98},
     year = {1928},
     zbl = {53.0455.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1928__98_159213/}
}