TY  - JOUR
AU  - E. V. Shikin
TI  - On global isometric imbedding in $\mathbf{R}^3$ of some metrics of nonpositive curvature
JO  - Doklady Akademii Nauk
PY  - 1974
SP  - 61
EP  - 63
VL  - 215
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1974_215_1_a14/
LA  - ru
ID  - DAN_1974_215_1_a14
ER  -