TY  - JOUR
AU  - N. A. Izobov
AU  - A. S. Platonov
TI  - On the existence of a linear Pfaffian system with a disconnected lower characteristic set of positive measure
JO  - Differencialʹnye uravneniâ
PY  - 1999
SP  - 65
EP  - 71
VL  - 35
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1999_35_1_a9/
LA  - ru
ID  - DE_1999_35_1_a9
ER  -