TY  - JOUR
AU  - Górniewicz, Lech
TI  - Periodic problems for ODEs via multivalued Poincaré operators
JO  - Archivum mathematicum
PY  - 1998
SP  - 93
EP  - 104
VL  - 34
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ARM_1998__34_1_a9/
LA  - en
ID  - ARM_1998__34_1_a9
ER  -