@article{JRAM_1931__165_149772,
     author = {M. Krafft and R. K\"onig},
     title = {\"Uber {Primfunktionen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {96--108},
     publisher = {mathdoc},
     volume = {165},
     year = {1931},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1931__165_149772/}
}