%0 Journal Article %A Paul Erdős %A Carl Pomerance %A Eric Schmutz %T Carmichael's lambda function %J Acta Arithmetica %D 1991 %P 363-385 %V 58 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-58-4-363-385/ %R 10.4064/aa-58-4-363-385 %G en %F 10_4064_aa_58_4_363_385