@article{10_4064_aa_32_4_313_347,
     author = {Imre Ruzsa},
     title = {General multiplicative functions},
     journal = {Acta Arithmetica},
     pages = {313--347},
     publisher = {mathdoc},
     volume = {32},
     number = {4},
     year = {1977},
     doi = {10.4064/aa-32-4-313-347},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-32-4-313-347/}
}