@article{GDZPPN00228894X, title = {Arithmetical Functions of Finite Abelian Groups.}, journal = {Mathematische Annalen}, volume = {142}, year = {1961}, pages = {165-182}, zbl = {0093.24803}, url = {http://dml.mathdoc.fr/item/GDZPPN00228894X} }
COHEN, E. Arithmetical Functions of Finite Abelian Groups.. Mathematische Annalen, Tome 142 (1961) pp. 165-182. http://gdmltest.u-ga.fr/item/GDZPPN00228894X/