%0 Journal Article %A E. Cohen %T Unitary products of arithmetical functions %J Acta Arithmetica %D 1961 %P 29-38 %V 7 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-7-1-29-38/ %R 10.4064/aa-7-1-29-38 %G en %F 10_4064_aa_7_1_29_38