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@article{MZ_1960__74_169870, author = {Eckford Cohen}, title = {Arithmetical functions associated with the unitary divisors of an integer.}, journal = {Mathematische Zeitschrift}, pages = {66--80}, publisher = {mathdoc}, volume = {74}, year = {1960}, zbl = {0094.02601}, url = {http://geodesic.mathdoc.fr/item/MZ_1960__74_169870/} }
Eckford Cohen. Arithmetical functions associated with the unitary divisors of an integer.. Mathematische Zeitschrift, Tome 74 (1960), pp. 66-80. http://geodesic.mathdoc.fr/item/MZ_1960__74_169870/