%0 Journal Article %A U. N. Zakirov %T Equations of motion of a cosmic body of varying composition, on the basis of the theory of relativity %J Doklady Akademii Nauk %D 1980 %P 50-52 %V 254 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_254_1_a10/ %G ru %F DAN_1980_254_1_a10