@article{JRAM_1961__206_150464,
     author = {K. Prachar},
     title = {\"Uber die kleinste {Primzahl} einer arithmetischen {Reihe.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {3--4},
     publisher = {mathdoc},
     volume = {206},
     year = {1961},
     zbl = {0097.26001},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1961__206_150464/}
}