@article{MZ_1976__149_172388,
     author = {Dieter Wolke and Lutz Lucht},
     title = {Trigonometrische {Reihen} \"uber multiplikativen {Zahlenmengen.}},
     journal = {Mathematische Zeitschrift},
     pages = {155--168},
     year = {1976},
     volume = {149},
     zbl = {0312.10026},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__149_172388/}
}