%0 Journal Article %A P. N. Vabishchevich %A L. M. Degtyarev %T A method of solution of the free-boundary problem for elliptic equations and systems %J Doklady Akademii Nauk %D 1979 %P 1342-1346 %V 247 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1979_247_6_a14/ %G ru %F DAN_1979_247_6_a14