TY  - JOUR
AU  - S. V. Buyalo
TI  - Collapsing manifolds of nonpositive curvature.~II
JO  - Algebra i analiz
PY  - 1989
SP  - 70
EP  - 97
VL  - 1
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_1989_1_6_a1/
LA  - ru
ID  - AA_1989_1_6_a1
ER  -