%0 Journal Article
%A D. Olević
%A D. Djurović
%T The Periodicity of Residuals $\Delta_{\varphi}$ and $\Delta \theta$ of The Double Star ADS 11520
%J Publications of the Department of Astronomy
%D 1981
%P 15 
%V 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PDA_1981_11_a1/
%G en
%F PDA_1981_11_a1