%0 Journal Article %A V. M. Tsvetkov %T On some 2-extension of the field~$\mathbb Q$ of rational numbers %J Zapiski Nauchnykh Seminarov POMI %D 1997 %P 192-196 %V 236 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1997_236_a21/ %G ru %F ZNSL_1997_236_a21