TY  - JOUR
AU  - N. V. Efimov
TI  - Qualitative problems of the theory of deformations of surfaces in the small
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1949
SP  - 3
EP  - 128
VL  - 30
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1949_30_a0/
LA  - ru
ID  - TM_1949_30_a0
ER  -