TY  - JOUR
AU  - D. Olević
AU  - D. Djurović
TI  - The Periodicity of Residuals $\Delta_{\varphi}$ and $\Delta \theta$ of The Double Star ADS 11520
JO  - Publications of the Department of Astronomy
PY  - 1981
SP  - 15 
VL  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PDA_1981_11_a1/
LA  - en
ID  - PDA_1981_11_a1
ER  -