TY  - JOUR
AU  - M. S. Nikol'skii
TI  - Singular Sets of Extremal Controls in Optimal Control Problems
JO  - Informatics and Automation
PY  - 2019
SP  - 252
EP  - 256
VL  - 304
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_2019_304_a15/
LA  - ru
ID  - TRSPY_2019_304_a15
ER  -