TY  - JOUR
AU  - V. I. Berdyshev
TI  - Characterization of optimal trajectories in $\mathbb {R}^3$
JO  - Trudy Instituta matematiki i mehaniki
PY  - 2018
SP  - 40
EP  - 45
VL  - 24
IS  - 2
UR  - http://geodesic.mathdoc.fr/item/TIMM_2018_24_2_a4/
LA  - ru
ID  - TIMM_2018_24_2_a4
ER  -