@article{JRAM_1927__157_149611,
     author = {Edmund Landau},
     title = {\"Uber {Dirichletsche} {Reihen} mit komplexen {Charakteren.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {26--32},
     publisher = {mathdoc},
     volume = {157},
     year = {1927},
     zbl = {52.0162.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1927__157_149611/}
}