%0 Journal Article %A U. A. Akramov %T An isolated theorem for forms of purely real algebraic fields %J Zapiski Nauchnykh Seminarov POMI %D 1990 %P 5-12 %V 185 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1990_185_a0/ %G ru %F ZNSL_1990_185_a0