TY  - JOUR
AU  - A. S. Platonov
TI  - On the existence of a linear Pfaffian system with an arbitrary countable lower characteristic set
JO  - Differencialʹnye uravneniâ
PY  - 1999
SP  - 1382
EP  - 1386
VL  - 35
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1999_35_10_a10/
LA  - ru
ID  - DE_1999_35_10_a10
ER  -