%0 Journal Article %A V. S. Mokeǐchev %T Reconstruction of coefficients in linear mathematical models, and nonlinear boundary problems %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1989 %P 20-28 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1989_7_a3/ %G ru %F IVM_1989_7_a3