%0 Journal Article %A V. S. Gavrilov %A M. I. Sumin %T A parametric problem of the suboptimal control of the Goursat--Darboux system with a pointwise phase constraint %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2005 %P 40-52 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2005_6_a3/ %G ru %F IVM_2005_6_a3