%0 Journal Article %A E. B. Gliner %T Vacuum-like state of a medium and Friedmann cosmology %J Doklady Akademii Nauk %D 1970 %P 771-774 %V 192 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_192_4_a17/ %G ru %F DAN_1970_192_4_a17