@article{MOMA_1968__72_177442,
     author = {Wolfgang Fluch},
     title = {Bemerkung \"uber quadratfreie {Zahlen} in arithmetischen {Progressionen.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {427--430},
     publisher = {mathdoc},
     volume = {72},
     year = {1968},
     zbl = {0167.31901},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1968__72_177442/}
}