TY  - JOUR
AU  - A. M. Abdrakhmanov
TI  - On a first-order system which is degenerating at a point
JO  - Differencialʹnye uravneniâ
PY  - 1981
SP  - 913
VL  - 17
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1981_17_5_a15/
LA  - ru
ID  - DE_1981_17_5_a15
ER  -