%0 Journal Article %A L. A. Aksent'ev %T Symmetric solutions of inverse boundary value problems %J Trudy seminara po kraevym zadačam %D 1977 %P 20-27 %V 14 %N 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUKZ_1977_14_14_a1/ %G ru %F KUKZ_1977_14_14_a1