%0 Journal Article
%A A. V. Ustinov
%T On the number of solutions of the congruence $xy\equiv l$ $(\operatorname{mod}q)$ under the graph of a~twice continuously differentiable function
%J Algebra i analiz
%D 2008
%P 186-216
%V 20
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AA_2008_20_5_a7/
%G ru
%F AA_2008_20_5_a7