TY  - JOUR
AU  - N. G. Perlova
TI  - On some second-order rigidity conditions for analytic surfaces
JO  - Matematičeskie zametki
PY  - 1973
SP  - 233
EP  - 242
VL  - 14
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1973_14_2_a8/
LA  - ru
ID  - MZM_1973_14_2_a8
ER  -