@article{ELMA_1972__27_141080,
     author = {Andrzej Makowski},
     title = {Remark on multiplicative functions.},
     journal = {Elemente der Mathematik},
     pages = {132--133},
     publisher = {mathdoc},
     volume = {27},
     year = {1972},
     zbl = {0243.10005},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1972__27_141080/}
}