TY  - JOUR
AU  - Bularas Driss
AU  - M. N. Popa
TI  - Concomitants of a system with quadratic nonlinearities
JO  - Differencialʹnye uravneniâ
PY  - 1978
SP  - 835
EP  - 842
VL  - 14
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1978_14_5_a6/
LA  - ru
ID  - DE_1978_14_5_a6
ER  -