%0 Journal Article %A V. P. Bovkun %A S. Ya. Braude %A A. V. Men' %T Observations of a compact source in Cas A at $20$ and $25$ MHz %J Doklady Akademii Nauk %D 1981 %P 811-813 %V 259 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_259_4_a9/ %G ru %F DAN_1981_259_4_a9