TY  - JOUR
AU  - A. N. Burdukovskii
TI  - Conditions for the optimality of singular controls in the Goursat--Darboux problem
JO  - Diskretnyj analiz i issledovanie operacij
PY  - 1985
SP  - 31
EP  - 39
IS  - 26
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DA_1985_26_a2/
LA  - ru
ID  - DA_1985_26_a2
ER  -