%0 Journal Article %A A. V. Bitsadze %T Exact solutions of some variants of the gravitational field equations %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1981 %P 19-24 %V 157 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1981_157_a1/ %G ru %F TM_1981_157_a1