TY  - JOUR
AU  - S. A. Akbarov
AU  - V. A. Toponogov
TI  - A theorem on the congruence of the angles of a triangle for a class of Riemannian manifolds
JO  - Matematičeskie trudy
PY  - 1987
SP  - 16
EP  - 25
VL  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MT_1987_9_a1/
LA  - ru
ID  - MT_1987_9_a1
ER  -