%0 Journal Article %A A. V. Pukhlikov %T Degenerations of Hamiltonian structures in optimal control problems %J Differencialʹnye uravneniâ %D 1995 %P 1874-1879 %V 31 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1995_31_11_a11/ %G ru %F DE_1995_31_11_a11