%0 Journal Article
%A L. A. Takhtadzhyan
%T Asymptotic formula for the sum of the lengths of the periods of the quadratic irrationalities of discriminant~$D$
%J Zapiski Nauchnykh Seminarov POMI
%D 1979
%P 134-144
%V 91
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1979_91_a9/
%G ru
%F ZNSL_1979_91_a9