%0 Journal Article
%A A. S. Pen
%A B. F. Skubenko
%T Estimation from above of the period of a quadratic irrationality
%J Matematičeskie zametki
%D 1969
%P 413-418
%V 5
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1969_5_4_a2/
%G ru
%F MZM_1969_5_4_a2