TY  - JOUR
AU  - È. I. Grudo
TI  - Necessary and sufficient conditions for the existence of periodic solutions of linear inhomogeneous periodic Pfaffian systems
JO  - Differencialʹnye uravneniâ
PY  - 1988
SP  - 2052
EP  - 2056
VL  - 24
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1988_24_12_a4/
LA  - ru
ID  - DE_1988_24_12_a4
ER  -