%0 Journal Article %A E. R. Avakov %A G. G. Magaril-Il'yaev %T Generalized Needles and Second-Order Conditions in Optimal Control %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2019 %P 15-31 %V 304 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2019_304_a1/ %G ru %F TM_2019_304_a1