%0 Journal Article %A M. I. Ronzhina %A L. A. Manita %A L. V. Lokutsievskiy %T Solutions of a Hamiltonian system with two-dimensional control in a neighbourhood of a singular second-order extremal %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2021 %P 936-938 %V 76 %N 5 %U http://geodesic.mathdoc.fr/item/RM_2021_76_5_a5/ %G en %F RM_2021_76_5_a5