TY  - JOUR
AU  - A. A. Belolipetskii
TI  - Differentiability of the isochronous surfaces in a linear time-optimal problem
JO  - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki
PY  - 1973
SP  - 1319
EP  - 1323
VL  - 13
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZVMMF_1973_13_5_a20/
LA  - ru
ID  - ZVMMF_1973_13_5_a20
ER  -