TY  - JOUR
AU  - V. A. Toponogov
TI  - Extremal theorems for Riemannian spaces with curvature bounded from above
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 300
EP  - 302
VL  - 184
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_184_2_a10/
LA  - ru
ID  - DAN_1969_184_2_a10
ER  -