@article{MAN_1961__142_160825,
     author = {E. COHEN},
     title = {Arithmetical {Functions} of {Finite} {Abelian} {Groups.}},
     journal = {Mathematische Annalen},
     pages = {165--182},
     publisher = {mathdoc},
     volume = {142},
     year = {1961},
     zbl = {0093.24803},
     url = {http://geodesic.mathdoc.fr/item/MAN_1961__142_160825/}
}