@article{JRAM_1952__189_150200,
     author = {Adam Schmidt},
     title = {Lineare partielle {Differentialgleichungen} mit konstanten {Koeffizienten.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {160--167},
     publisher = {mathdoc},
     volume = {189},
     year = {1952},
     zbl = {0044.31503},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1952__189_150200/}
}