TY  - JOUR
AU  - V. Sh. Yusufov
TI  - Open openly covering maps
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1990
SP  - 175
EP  - 176
VL  - 45
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1990_45_6_a22/
LA  - en
ID  - RM_1990_45_6_a22
ER  -