%0 Journal Article %A H. Williams %T A generalization of Lehmer's functions %J Acta Arithmetica %D 1976 %P 315-341 %V 29 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-29-4-315-341/ %R 10.4064/aa-29-4-315-341 %G en %F 10_4064_aa_29_4_315_341