TY  - JOUR
AU  - I. G. Tsar'kov
TI  - The Geometry of a Singular Set of Hypersurfaces and the Eikonal Equation
JO  - Matematičeskie zametki
PY  - 2020
SP  - 441
EP  - 451
VL  - 108
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2020_108_3_a8/
LA  - ru
ID  - MZM_2020_108_3_a8
ER  -