%0 Journal Article %A É. B. Bykhovskii %T Mathematical problems in the theory of a one-dimensional %J Doklady Akademii Nauk %D 1990 %P 1106-1110 %V 314 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1990_314_5_a21/ %G ru %F DAN_1990_314_5_a21