TY  - JOUR
AU  - N. V. Efimov
AU  - Z. D. Usmanov
TI  - Infinitesimal bending of a surface with a point of flatness
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 28
EP  - 31
VL  - 208
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_208_1_a5/
LA  - ru
ID  - DAN_1973_208_1_a5
ER  -