TY  - JOUR
AU  - G. G. Laptev
TI  - Absence of solutions of differential inequalities and systems of hyperbolic type in conic domains
JO  - Izvestiya. Mathematics 
PY  - 2002
SP  - 1147
EP  - 1170
VL  - 66
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_2002_66_6_a3/
LA  - en
ID  - IM2_2002_66_6_a3
ER  -