TY  - JOUR
AU  - A. D. Aleksandrov
AU  - A. V. Pogorelov
TI  - Nikolay Vladimirovich Efimov (on the occasion of his fiftieth birthday)
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1960
VL  - 15
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1960_15_6_a13/
LA  - ru
ID  - RM_1960_15_6_a13
ER  -