TY  - JOUR
AU  - M. V. Dragnev
AU  - V. V. Ryzhkov
TI  - On the geometry of the characteristic cones of a mapping of $P_m$ into $P_n$ when $m>n$
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1974
SP  - 81
EP  - 86
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1974_5_a9/
LA  - ru
ID  - IVM_1974_5_a9
ER  -