TY  - JOUR
AU  - A. S. Vinogradskii
TI  - Boundary properties of surfaces with slowly varying negative curvature
JO  - Sbornik. Mathematics
PY  - 1970
SP  - 257
EP  - 271
VL  - 11
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1970_11_2_a9/
LA  - en
ID  - SM_1970_11_2_a9
ER  -