%0 Journal Article %A V. I. Plotnikov %A M. I. Sumin %T Optimal control of distributed parameter systems described by nonsmooth Goursat--Darboux systems with constraints of inequality type %J Differencialʹnye uravneniâ %D 1984 %P 851-860 %V 20 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1984_20_5_a14/ %G ru %F DE_1984_20_5_a14