@article{MZ_1978__159_172649,
     author = {Lutz Lucht},
     title = {Summen mit der {M\"obius-Funktion.}},
     journal = {Mathematische Zeitschrift},
     pages = {123--132},
     publisher = {mathdoc},
     volume = {159},
     year = {1978},
     zbl = {0357.10002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__159_172649/}
}