TY  - JOUR
AU  - S. V. Buyalo
TI  - Collapsing manifolds of nonpositive curvature.~I
JO  - Algebra i analiz
PY  - 1989
SP  - 74
EP  - 94
VL  - 1
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_1989_1_5_a1/
LA  - ru
ID  - AA_1989_1_5_a1
ER  -