%0 Journal Article %A V. A. Pelykh %T Correctness of the Country problem statement for a system of Einstein equations, coordinate conditions and the theory of reference systems %J Doklady Akademii Nauk %D 1979 %P 590-593 %V 247 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1979_247_3_a19/ %G ru %F DAN_1979_247_3_a19