TY - JOUR AU - A. A. Melikyan TI - Singular characteristics of first-order partial differential equations in optimal control and differential games JO - Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory PY - 1999 SP - 179 EP - 196 VL - 64 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/INTO_1999_64_a6/ LA - ru ID - INTO_1999_64_a6 ER -