@article{MZ_1981__177_173069,
     author = {Lutz Lucht},
     title = {Power {Series} with {Multiplicative} {Coefficients.}},
     journal = {Mathematische Zeitschrift},
     pages = {359--374},
     publisher = {mathdoc},
     volume = {177},
     year = {1981},
     zbl = {0439.10031},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__177_173069/}
}