%0 Journal Article %A V. G. Zadorozhniǐ %T An inverse problem of the calculus of variations for systems of differential equations %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1989 %P 79-82 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1989_9_a14/ %G ru %F IVM_1989_9_a14