%0 Journal Article
%A Ivić Aleksandar
%T Two inequalities 

 for the sum of divisors functions
%J Novi Sad Journal of Mathematics
%D 1977
%P 17-22
%V 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NSJOM_1977_7_Nonea_2/
%F NSJOM_1977_7_Nonea_2