TY  - JOUR
AU  - I. Ya. Bakelman
TI  - Non-regular surfaces of bounded external curvature
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 631
EP  - 632
VL  - 119
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_119_4_a0/
LA  - ru
ID  - DAN_1958_119_4_a0
ER  -