@article{JRAM_1971__250_151140,
     author = {Richard Warlimont},
     title = {\"Uber die kleinsten quadratfreien {Zahlen} in arithmetischen {Progressionen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {99--106},
     publisher = {mathdoc},
     volume = {250},
     year = {1971},
     zbl = {0224.10045},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1971__250_151140/}
}