TY  - JOUR
AU  - F. Clarke
TI  - Extremal arcs and extended Hamiltonian systems
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 427
EP  - 442
VL  - 13
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_3_a4/
LA  - ru
ID  - DE_1977_13_3_a4
ER  -