TY  - JOUR
AU  - M. M. Popov
TI  - On Morse index for geodesic lines on smooth surfaces imbedded in $\mathbb R^3$
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 2018
SP  - 211
EP  - 224
VL  - 471
UR  - http://geodesic.mathdoc.fr/item/ZNSL_2018_471_a12/
LA  - ru
ID  - ZNSL_2018_471_a12
ER  -