%0 Journal Article %A A. S. Matveev %T Lagrangian duality in nonconvex optimization, and modifications of the Toeplitz--Hausdorff theorem %J Doklady Akademii Nauk %D 1996 %P 19-23 %V 351 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1996_351_1_a5/ %G ru %F DAN_1996_351_1_a5