%0 Journal Article %A V. A. Srochko %T The quadratic phase approximation method for solving optimal control problems %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1993 %P 81-88 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1993_12_a8/ %G ru %F IVM_1993_12_a8