TY  - JOUR
AU  - A. V. Isaev
AU  - M. A. Mishchenko
TI  - Classification of spherical tube hypersurfaces having one minus in the signature of the Levi form
JO  - Izvestiya. Mathematics 
PY  - 1989
SP  - 441
EP  - 472
VL  - 33
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1989_33_3_a0/
LA  - en
ID  - IM2_1989_33_3_a0
ER  -