%0 Journal Article
%A Y.-F. S. Pétermann
%T Changes of sign of error terms related to Euler's function and to divisor functions.
%J Commentarii mathematici Helvetici
%D 1986
%P 84-101
%V 61
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1986__61_140042/
%F CMH_1986__61_140042